Asteraceae

Synopsis

Asteraceae (Compositae): A Comprehensive Reference on the Daisy Family as a Medicinal and Dietary Resource

1. Identity, Taxonomy, and Botanical Description

1.1 Nomenclature and Classification

The family Asteraceae, also known by its older but still accepted name Compositae, is the scientific designation for one of the largest groupings of flowering plants on Earth. Compositae, the original name for Asteraceae, were first described in 1740 by Dutch botanist Adriaan van Royen. The family belongs to the order Asterales, within the class Magnoliopsida (dicotyledons). The previous name for the family, Compositae, reflects the fact that what appears to be a single floral entity is in fact a composite of much smaller flowers. The word Asteraceae is derived from the genus Aster, itself from the Greek astēr (star), referring to the star-like appearance of the flower heads. The family is also colloquially referred to as the sunflower family, the daisy family, and the aster family.

The Asteraceae, traditionally known as Compositae, is composed of more than 34,000 species, corresponding to approximately 10% of all flowering plants. Other estimates differ slightly in species count: among plant families for herbal medicine, Asteraceae (formerly known as Compositae) is one of the most diverse and significant families having almost approximately 1,911 genera and approximately 32,913 accepted species and 13 subfamilies.

Traditionally, two subfamilies were recognised: Asteroideae (or Tubuliflorae) and Cichorioideae (or Liguliflorae). The latter has been shown to be extensively paraphyletic, and has now been divided into 12 subfamilies, but the former still stands.

1.2 Morphological Characteristics

The Asteraceae are herbs, shrubs, or less commonly trees and are arguably the largest family of flowering plants, comprising about 1,100 genera and 20,000 species that are characterized by having the flowers reduced and organized into an involucrate pseudanthium in the form of a head or capitulum. The leaves are alternate, opposite, or less commonly whorled, and range from simple to pinnately or palmately compound; stipules are absent.

The defining morphological feature of the family is the capitulum (flower head). A shared derived feature of all Asteraceae species is the capitulum, a head-like inflorescence mimicking a single flower, which is perhaps the most remarkable morphological innovation in angiosperms after the origin of flowers. The capitulum is a contracted raceme composed of numerous individual sessile flowers, called florets, all sharing the same receptacle. A set of bracts forms an involucre surrounding the base of the capitulum. These are called "phyllaries," or "involucral bracts."

The "petals" or "sunrays" in an "asteraceous" head are in fact individual strap-shaped flowers called ray flowers or ray florets, and the "sun disk" is made up of smaller, radially symmetric, individual flowers called disc flowers or disc florets. The florets are variable in morphology mainly in terms of their corolla symmetry and fertility such that they are classified into several types: actinomorphic tubular florets (usually bisexual), zygomorphic ray florets (usually female/neutral), zygomorphic ligulate florets (bisexual), zygomorphic bilabiate florets and asymmetric pseudobilabiate florets (female/neutral).

The ovary is inferior and one-celled, forming an achene in the fruit. The fruit, technically called a cypsela (an achene with fused calyx), is often capped by a pappus—a feathery or bristly structure derived from modified sepals that aids in wind dispersal, as seen conspicuously in dandelions and thistles.

1.3 Distribution and Ecology

The Asteraceae plants are distributed throughout the world but are most frequently distributed in subtropical areas including arid and semiarid regions. Asteraceae have colonised almost every conceivable habitat including the harshest ones; for example, Saussurea gnaphalodes is endemic to up to 6,400 m in the Himalayan periglacial region, the uppermost elevation limit recorded for vascular plants. The family is cosmopolitan and is especially diverse in the Mediterranean region and in temperate zones.

The Asteraceae is one of the most important families in the flora of different countries, which contains a large number of genera and species. This broad family consists of a wide range of aromatic, annual or perennial herbs, sub-shrubs, or shrubs, which are of economic importance.

1.4 Notable Genera and Species

The family encompasses an enormous diversity of economically, nutritionally, and medicinally important plants. Commercially important plants in Asteraceae include the food crops Lactuca sativa (lettuce), Cichorium (chicory), Cynara scolymus (globe artichoke), Helianthus annuus (sunflower), Smallanthus sonchifolius (yacón), Carthamus tinctorius (safflower) and Helianthus tuberosus (Jerusalem artichoke). The family includes a number of well-known species, such as chicory, sunflower, lettuce, coreopsis, dahlias and daisy, as well as a number of plants of medicinal significance, such as wormwood, chamomile and dandelion. Ornamental genera include Chrysanthemum, Gerbera, Calendula, Dendranthema, Argyranthemum, Dahlia, Tagetes, and Zinnia, among others.

1.5 Common Forms and Preparations

Members of the Asteraceae family are utilized in a wide range of preparation formats:

Herbal teas and infusions — Plants are used as herbs and in herbal teas and other beverages. Chamomile, for example, comes from two different species: the annual Matricaria chamomilla (German chamomile) and the perennial Chamaemelum nobile (Roman chamomile).
Standardized extracts and tinctures — Ethanolic, hydroethanolic, aqueous, and lipophilic (e.g., dichloromethane) extracts are the predominant forms used in phytopharmaceutical research, each capturing distinct phytochemical profiles.
Essential oils — Most of the studies were performed on the herbal plant families such as Asteraceae, Lamiaceae, Myrtaceae, Rutaceae, and Zingiberaceae to extract around 3,000 essential oils.
Dried aerial parts, roots, and flowers — The plant part used varies significantly by species; roots are primary for chicory (inulin extraction) and dandelion, flowers for chamomile and arnica, aerial parts for yarrow and artemisia.
Pharmaceutical preparations — Plants belonging to this family have a long history of being used as medicinal plants for the treatment of various diseases. Many of them are also used in the preparation of foods, beverages, and also used in pharmaceutical and cosmetic industries.
Nutraceutical/functional food ingredients — Inulin, extracted primarily from chicory root (Cichorium intybus), is a widely commercialized prebiotic fiber (see Section 6.3).

2. Traditional and Historical Use

2.1 Global Scope and Antiquity

Since old times, the consumption of herbs of the Asteraceae family as food and as medicine has continued. Some of the Asteraceae plants have been cultivated for more than 3,000 years as food and medicine. Compared with other plant families, it seems that more plants from the Asteraceae family have been used for medicinal purposes due to their wide range of biologically active compounds that confer medicinal properties and because it is one of the largest families in the plant kingdom.

2.2 Indigenous Peoples of North America

The Asteraceae is the largest family of plants in North America and is widely used as medicine by Indigenous peoples. Studies have investigated the medicinal ethnobotany of North American Asteraceae to identify taxa that appear preferentially selected or avoided for general and specific medicinal uses. A major ethnobotanical database summarizes published reports of traditional plant uses by approximately 300 Indigenous "tribes" across North America into use categories: "drug," "food," "fibre," "dye," and "other."

2.3 Eurasian and Mediterranean Traditions

The genus Achillea has been well-known for its diversity, frequency, and pharmaceutical uses in traditional and folk medicine since ancient times. From an ethnobotanical approach, the species belonging to this genus have been widely prescribed in different traditional and folk medicines for a long time. Achillea millefolium L. (yarrow) is a perennial plant native to the temperate regions of Europe and Asia. It has been utilized by humans for well over 3,000 years. The origin of the genus name historically dates back to the mythical Greek hero Achilles, who was said to use these plants for healing wounded soldiers.

As early as the 13th century, Europeans used Calendula officinalis (calendula/marigold) to cure wounds. Since then, several cosmetic products have been created using components derived from calendula.

In the Mediterranean region, ethnobotanical research spanning Eastern Morocco and Eastern Andalusia documents shared knowledge of Asteraceae plants across 20 centuries of history. In Morocco, 10 taxa of the family are used to treat 45 medical conditions belonging to 10 pathological groups.

Since ancient times, cardoon (Cynara cardunculus L.) has played an essential role in the culinary and medicinal traditions of the Mediterranean.

2.4 Traditional Chinese Medicine and Asian Traditions

Inula britannica is an important plant species used in Traditional Chinese Medicine (TCM) and Kampo Medicines. Along with Inula japonica, it is known as 'Xuan Fu Hua' in TCM. Artemisia vulgaris L. (mugwort), belonging to the family of Asteraceae, is widespread throughout Asia, North America, and Europe. It has been extensively used as a traditional medicinal plant for relieving pain and treating gynecological symptoms in folk medicine.

Plants such as Artemisia annua have played an important role in the discovery of novel drugs. The use of Artemisia annua (sweet wormwood, qing hao) for febrile illness in China dates back to at least the 4th century CE.

2.5 South Asia and Pakistan

Overall, 198 species from 78 genera of Asteraceae with traditional uses have been reported in Pakistan, with Artemisia (16.6%), Launea (4%), Sassurea (4%), Conyza (3.5%), Lactuca, and Taraxacum (3%) being widely used genera. Ethnomedicinal uses of Asteraceae were reported against 126 diseases in Pakistan.

2.6 Africa

In Zimbabwe, 50 Asteraceae species are traditionally used to manage human and animal diseases, and these species are used against 51 medical conditions, mainly including the treatment of gastro-intestinal problems. In Ethiopia, a total of 81 medicinal plants belonging to 47 families have been identified among traditional healers, with the majority of plants used belonging to the Asteraceae (12) family.

2.7 Latin America

The genus Achyrocline, distributed across Latin America, is well-known for its medicinal properties. Reports from ethnobotanical studies conducted in the Brazilian state of Rio Grande do Sul showed that the plant Achyrocline satureioides (Lam.) DC. is often used as a healing agent. Ethnobotanical studies in Brazil document significant use of Asteraceae species in the treatment of respiratory diseases in regional phytotherapy traditions.

2.8 Summary of Traditional Indications

Across traditions and regions, Asteraceae plants have been employed for a broad spectrum of conditions, including antiparasitic medicine, wound healing, gastrointestinal complaints, respiratory ailments, gynecological conditions, liver and kidney diseases, inflammatory disorders, and febrile illnesses. For example, Carduus species have often been used as antihemorroidal and cardiotonic remedies in traditional medicine, and Onopordum tauricum as a remedy for liver disease.

3. Key Phytochemical Constituents

Many members of this family are widely studied for their bioactive chemical constituents, and phenolic acids, flavonoids, terpenoids, volatile components, etc. are reported as major compounds. The family is pharmacochemically distinguished by several compound classes of particular biological significance.

3.1 Sesquiterpene Lactones (SLs)

Sesquiterpene lactones (SLs) are composed of a large and diverse group of phytochemicals found in numerous plant families, with the greatest number of compounds belonging to the Asteraceae family. There are more than 5,000 SLs characterized as secondary metabolites in species of the plant kingdom, in particular in the family Asteraceae. The family is also a source of sesquiterpene lactones: the secondary metabolites responsible for the bitter taste of many plants.

Biosynthetically, these molecules derive from two main precursors, isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP). These precursors can be generated in plants via either the mevalonate pathway, which occurs within the cytosol, or the 2-C-methyl-D-erythritol pathway, occurring in the chloroplasts.

Notable individual SLs include:

Artemisinin — isolated from Artemisia annua; an approved antimalarial drug. Prominent examples include plants from the Asteraceae family, such as Tanacetum parthenium (feverfew), known for parthenolide; Cichorium intybus (chicory), containing lactucin and lactucopicrin; and Artemisia annua (sweet wormwood), the source of artemisinin.
Parthenolide — from Tanacetum parthenium (feverfew); studied for anti-inflammatory and anticancer properties.
Arglabin — from Artemisia glabella; the sesquiterpene lactones artemisinin and arglabin, isolated both from Artemisia species, are approved drugs for the treatment of human malaria and cancer, respectively.
Alantolactone, dehydrocostus lactone, costunolide — widely distributed SLs of dermatological and antimicrobial relevance. Sesquiterpene lactone mix contains alantolactone, dehydrocostus lactone, and costunolide.
Lactucin and lactucopicrin — bitter SLs found in chicory and lettuce, traditionally associated with sedative and analgesic properties.

3.2 Flavonoids

Flavonoids are hydroxylated phenolic compounds that are present in plants and occupy a special place among secondary metabolites. They are classified into different classes, with flavones, flavonols, flavanones, catechins, isoflavones, and anthocyanidins being the most common. Similar to terpenoids, they also present a wide range of biological activities. These compounds have been demonstrated to have protective effects against many infectious and degenerative diseases such as cancer, among other important pharmacological activities such as antioxidant and anti-inflammatory activities.

Phenolic compounds isolated from Asteraceae species and studied include euparin, jaceidin, nepetin, jaceosidin, eriodictyol, eupatorin, and 5-demethylsinensetin. Quercetin — a flavonol found widely in Asteraceae — is among the most studied; the flavone quercetin is currently being assessed in clinical trials on prostate cancer and its primary prevention.

3.3 Other Terpenoids

Terpenoids constitute the largest class of natural products derived from isoprene (C5) units joined head-to-tail or tail-to-head, among other possibilities. They are classified as hemiterpenes (C5), monoterpenes (C10), sesquiterpenes (C15), diterpenes (C20), sesterpenes (C25), triterpenes (C30), tetraterpenes (C40), and polyterpenes (>C40). They can be found in numerous living organisms, especially plants, fungi, and marine animals. Terpenoids are of great interest due to the broad range of biological activities reported such as cancer preventive effects and analgesic, anti-inflammatory, antimicrobial, antifungal, antiviral, and antiparasitic activities.

Asteraceae flowers and aerial parts are a rich source of terpenoids (sesquiterpene lactones and dimers, diterpenes, and triterpenoids) and flavonoids. The isolated compounds have shown diverse biological activities: anticancer, antioxidant, anti-inflammatory, neuroprotective, and hepatoprotective activities.

The essential oils of many Asteraceae species contain volatile monoterpenes. For example, gas chromatography analyses of Anthemis moghanica (Asteraceae) identified 1,8-cineole (16.3%), β-pinene (14.1%), α-pinene (12.8%), limonene (9.7%), and caryophyllene oxide (7.6%) as major constituents.

The chemical constituents of Artemisia vulgaris contain mainly polysaccharides, flavonoids, terpenoids, and sterols, showing anti-tumor, anti-inflammatory, hepatoprotective, anti-oxidant, immunomodulatory, anti-allergic, and anti-bacterial activities.

3.4 Polyphenols and Phenolic Acids

Pharmacological effects of Asteraceae plants can be attributed to their range of phytochemical compounds, including polyphenols, phenolic acids, flavonoids, acetylenes, and triterpenes. One such example is arctiin: a lignan with numerous antioxidant, antiproliferative, and desmutagenic activities. Chlorogenic acid, caffeic acid, and chicoric acid are phenolic acids commonly reported in multiple Asteraceae genera.

3.5 Polysaccharides (Inulin)

Inulin is widely distributed among various plant species, with the richest sources comprising members from the Asteraceae family, particularly chicory (Cichorium intybus L.), Jerusalem artichoke (Helianthus tuberosus), dahlia (Dahlia spp.), and agave roots. Inulin has a well-documented prebiotic effect and exhibits a broad range of functionalities, including fat-replacing, immunological system modulation, calcium absorption, and several other metabolic processes that contribute to gut health and reduction of risk of metabolic disorders.

Despite the wide variety of members within the family, most of them are rich in naturally occurring polysaccharides that possess potent prebiotic effects, which trigger their use as potential nutraceuticals.

3.6 Polyacetylenes

Polyacetylenes are an additional compound class characteristic of certain Asteraceae genera (notably Echinacea, Inula, and Bidens). They contribute to antimicrobial and immunomodulatory bioactivity profiles documented in preclinical research.

4. Mechanisms of Action

4.1 Inhibition of NF-κB Signaling

The nuclear factor kappa-B (NF-κB) pathway is one of the central molecular targets of Asteraceae sesquiterpene lactones. Artemisinin shares with other sesquiterpene lactones the ability to inhibit the activation of the nuclear factor NF-κB; by this mechanism, artemisinin, as well as parthenolide, inhibits nitric oxide synthesis in cytokine-stimulated human astrocytoma T67 cells. Parthenolide inhibits the decomposition of this inhibitory protein through binding to the IκB-α subunit, acting as an NF-κB inhibitor.

4.2 Inhibition of Inducible Nitric Oxide Synthase (iNOS) and COX-2

Isolated sesquiterpenoids from Artemisia vulgaris dose-dependently exhibited NO production inhibitory activity by inhibiting the expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2), with IC₅₀ values ranging from 1.0 to 3.6 μM.

4.3 Anti-inflammatory Mechanisms (General SL Class)

Sesquiterpene lactones, characterized by their high prevalence in the Asteraceae family, are one of the major groups of secondary metabolites found in plants. Researchers from distinct research fields, including pharmacology, medicine, and agriculture, are interested in their biological potential. Several mechanisms are proposed for the reduction of inflammation and tumorigenesis at potentially achievable levels in humans.

4.4 Antioxidant and Free Radical Scavenging

Asteraceae plants have a strong antioxidant effect, followed by anti-hyperlipidemic, vasodilation, antithrombotic, and diuretic effects which are mechanisms that are closely related in resolving cardiovascular diseases such as coronary heart disease (CHD), atherosclerosis, hypertension, and others. Flavonoids and polyphenols in the family function primarily through electron transfer and hydrogen atom transfer mechanisms, quenching reactive oxygen species (ROS) and chelating transition metals.

4.5 Prebiotic Fermentation and Gut Microbiota Modulation

For inulin-type fructans derived from Asteraceae plants, the primary mechanism of systemic effect is microbial: inulin is fermented by Bifidobacterium and Lactobacillus species, resulting in the production of short-chain fatty acids, which promote gut barrier integrity, immune equilibrium, metabolic health, and overall systemic wellness.

4.6 Antiparasitic Mechanisms

Some molecules from Asteraceae can inhibit protozoan parasites such as Plasmodium, Trypanosoma, Leishmania, and parasitic intestinal worms, and thus have potential in medicine. Artemisinin's antimalarial mechanism involves generation of reactive oxygen species within the parasite's food vacuole upon activation by iron (heme), leading to alkylation of parasite proteins.

4.7 Covalent Binding and Allergenic Potential

The α-methylene-γ-lactone group present in many SLs confers both bioactivity and allergenicity. The ability of SLs to bind covalently with biological macromolecules is also the basis of their allergenicity, and the reason why the sunflower family is a notable cause of contact dermatitis.

5. Scientific Evidence by Area of Use

5.1 Antimalarial Activity — Artemisinin and Derivatives

This represents the single strongest area of translational evidence from any Asteraceae compound. The sesquiterpene lactones artemisinin and arglabin, isolated both from Artemisia species, are approved drugs for the treatment of human malaria and cancer, respectively. Artemisinin-based combination therapies (ACTs) are the current WHO-recommended first-line treatment for uncomplicated Plasmodium falciparum malaria, representing the transition from traditional botanical use to rigorously validated pharmaceutical drugs derived from the Asteraceae family. These results suggest that artemisinin, in addition to its antiparasitic properties, could also exert a therapeutic effect on neurological complications of malaria.

Evidence strength: High — multiple Phase III randomized controlled trials and WHO-approved drug status for artemisinin derivatives (artesunate, artemether).

5.2 Anti-inflammatory Activity

Sesquiterpenoids, and specifically sesquiterpene lactones from Asteraceae, may play a highly significant role in human health, both as part of a balanced diet and as pharmaceutical agents, due to their potential for the treatment of cardiovascular disease and cancer. Ethanolic extract of flowers of Arnica montana (Asteraceae) was found to contain newer anti-inflammatory principles like 1,5-trans-guaianolide on NF-κB EMSA cells and in the IL-8 ELISA cells, both in vitro and in vivo.

Studies of folk medicines implicate sesquiterpene lactones as the active ingredient in many treatments for ailments such as diarrhea, burns, influenza, and neurodegeneration.

Evidence strength: Moderate (preclinical to early human) — extensive in vitro and animal data; limited but growing human RCT data for specific preparations such as chamomile and calendula extracts.

5.3 Antitumor and Anticancer Potential

The antimalarial artemisinin shows potential anticancer activity, and a dimeric derivative exhibits improved antitumor efficacy. Artesunate, dimethylaminoparthenolide, and an L12ADT peptide prodrug of thapsigargin are being evaluated in current cancer clinical or preclinical trials. Among these compounds, artesunate, dimethylaminoparthenolide, and L12ADT peptide prodrug, a derivative of thapsigargin, are being evaluated in current cancer clinical or preclinical trials. Based on the structures of several antitumor sesquiterpene lactones, a number of analogues showing greater potency have been isolated or partially synthesized. The present research focuses on artemisinin, parthenolide, thapsigargin, and their naturally occurring or synthetic analogues showing potential anticancer activity.

Regarding arglabin, it is approved as an anticancer drug in Kazakhstan, derived from Artemisia glabella. A few studies related to active compounds testing in animal models but pharmacokinetics/pharmacodynamics in laboratory animals and clinical trials are warranted to investigate their effects, including the mechanisms of action.

Evidence strength: Preliminary to moderate — strong preclinical (in vitro and animal) evidence; select compounds (artesunate, arglabin) in clinical trials or approved use; most Asteraceae species remain at in vitro stage only.

5.4 Prebiotic and Gastrointestinal Effects (Inulin from Asteraceae)

Inulin-type fructans (ITF), including short-chain fructooligosaccharides (scFOS), oligofructose, and inulin, are commonly used fibers that are widely regarded as prebiotic for their ability to be selectively utilized by the intestinal microbiota to confer a health benefit. Evidence from studies suggest that ITF have a prebiotic effect on the intestinal microbiota, promoting the abundances of Bifidobacterium, Lactobacillus, and Faecalibacterium prausnitzii. Beneficial health effects reported following ITF intake include improved intestinal barrier function, improved laxation, increased insulin sensitivity, decreased triglycerides and an improved lipid profile, increased absorption of calcium and magnesium, and increased satiety.

A systematic review and meta-analysis found: evidence indicates that inulin supplementation can reduce intestinal inflammation, improve lipid and glucose metabolism, and modulate the gut–brain axis. However, variations in dose, degree of polymerization (DP), host condition, and baseline microbiota composition have contributed to inconsistent or even adverse responses across studies.

Evidence strength: Moderate to good for prebiotic outcomes — multiple human RCTs support bifidogenic effect and improvements in bowel function and lipid parameters; evidence for other outcomes (glycemia, body composition) is more variable.

5.5 Cardiovascular Effects

Achillea millefolium L., a plant species from the Asteraceae family, exhibited diuretic effect in a hypertension group. It is often found in Brazil and used as Brazilian folk medicine, usually for kidney and heart diseases. A wide variety of therapeutic properties, such as antioxidant, lipid-lowering, anti-inflammatory, antidiabetic, antibacterial, and anticancer abilities, have been attributed to the various bioactive substances of cardoon (Cynara cardunculus).

Evidence strength: Preliminary — mostly in vitro and animal pharmacology; cardiovascular human trials specific to Asteraceae extracts are sparse and have limitations.

5.6 Antidiabetic Potential

Traditional knowledge plays a powerful role in establishing botanical drugs from Asteraceae family as antioxidants, hepatoprotective agents, vasodilators, and wound healing agents, with further action for the prevention of major diseases like cardiovascular disease (CVD), liver cirrhosis, and diabetes mellitus (DM). A review provides detailed information on the reported Asteraceae plants traditionally used as antidiabetic agents, with a major focus on antioxidant, hepatoprotective, vasodilatory, and wound healing effects.

Evidence strength: Preliminary — the majority of antidiabetic evidence for Asteraceae species remains preclinical (cell and animal models). Human clinical data for specific species is limited and often involves small, short-duration trials.

5.7 Antimicrobial and Antiviral Activity

Although there were many reports for antimicrobial and antioxidant effects of Asteraceae species, applications of these extracts in treating infectious diseases need evaluation on pathogenic bacterial strains isolated from clinical specimens. Researchers screened antimicrobial and antioxidant activities of ethanol extracts and essential oils from nine species of Asteraceae on 30 clinical strains causing urinary tract infection. Antiviral activity is documented for flavonoids and SLs isolated from the family, including activity against dengue virus (DENV-2) in cell culture models; sesquiterpene lactones isolated from Asteraceae species include mikanolide, eupatoriopicrin, eupahakonenin B, minimolide, and estafietin, among others with antiviral potential.

Evidence strength: Preliminary (in vitro) — the broad antimicrobial data for Asteraceae exists predominantly at cell and microbroth dilution levels; clinical antimicrobial trials are absent for the family as a whole.

5.8 Antiparasitic Activity Beyond Malaria

Some molecules can inhibit protozoan parasites such as Plasmodium, Trypanosoma, Leishmania, and parasitic intestinal worms, and thus have potential in medicine. Research on parthenolide and related SLs from feverfew has shown activity against Plasmodium falciparum sexual stages: parthenin and parthenolide are natural products closely related in structure to artemisinin, which is also a sesquiterpene lactone and one of the most important antimalarial drugs available. Parthenin, like artemisinin, has an effect on Plasmodium blood stage development.

Evidence strength: Preliminary — mostly in vitro and preclinical; artemisinin derivatives (from Asteraceae) are proven. Other anti-parasitics remain experimental.

6. Body Systems and Health Areas Associated with Asteraceae

The pharmacological scope of the Asteraceae family is exceptionally wide. The following body systems and health domains are supported by phytochemical and/or clinical data:

Immune and inflammatory system — anti-inflammatory activity via NF-κB, COX-2, and iNOS inhibition; immunomodulatory polysaccharides (e.g., from Echinacea spp.)
Gastrointestinal system — prebiotic inulin-type fructans promoting beneficial microbiota; bitter SLs stimulating digestive secretion; traditional use for gastro-intestinal complaints across multiple cultures
Cardiovascular system — plants have a strong antioxidant effect, followed by anti-hyperlipidemic, vasodilation, antithrombotic, and diuretic effects which are mechanisms closely related to resolving cardiovascular diseases such as coronary heart disease, atherosclerosis, and hypertension.
Hepatic system — Asteraceae family members show a wide range of anti-inflammatory, antimicrobial, antioxidant, and hepatoprotective activities. Silymarin from Silybum marianum (milk thistle) is the best-studied hepatoprotective agent in the family.
Parasitology / Infectious diseases — artemisinin-derived drugs approved for P. falciparum malaria
Oncology — preclinical and early clinical research on artemisinin derivatives and parthenolide analogues
Endocrine/metabolic system — potential antidiabetic and lipid-modulating activities; inulin's effect on insulin sensitivity and lipid profiles in human trials
Skin and dermatology — wound healing (calendula, arnica); contact dermatitis risk from SLs; anti-inflammatory topical applications
Respiratory system — traditional and ethnopharmacological use for asthma, bronchitis, and upper respiratory complaints, especially in South American and Asian traditions

7. Dosage Forms and Dosages Reported in Studies

Because Asteraceae is a plant family rather than a single species or extract, dosages are species- and preparation-specific. The following are dosages specifically stated or cited in sources:

Inulin (prebiotic fiber from chicory/Jerusalem artichoke): inulin treatments with an average degree of polymerization (DPn) of 7, 14, and 27 were administered at 1 g/kg of body weight to high-fat diet-fed rats over 21 days (animal study). In human clinical trials, inulin-type fructans are typically studied at doses ranging from approximately 5 to 20 g/day; beneficial health effects reported following ITF intake include improved intestinal barrier function, improved laxation, increased insulin sensitivity, decreased triglycerides and an improved lipid profile, increased absorption of calcium and magnesium, and increased satiety.
Sesquiterpene lactone mix (patch testing, diagnostic): the Asteraceae allergy screening panel developed by the North American Contact Dermatitis Group uses sesquiterpene lactone mix (SL mix; a mix of three common SLs: alantolactone, dehydrocostus lactone, and costunolide) and Compositae mix (CM) comprising biological substances from five Asteraceae species.
Artemisia vulgaris sesquiterpene lactones (in vitro, anti-inflammatory): isolated sesquiterpenoids dose-dependently exhibited NO production inhibitory activity with IC₅₀ values ranging from 1.0 to 3.6 μM.
Artemisinin (in vitro anti-inflammatory): micromolar doses of sesquiterpene lactones have been shown to inhibit nitrite levels, NOS activity, and expression.

No single standardized dose applies across the Asteraceae family. Regulatory approval and clinical dosing recommendations exist only for individual isolated compounds (e.g., artemisinin derivatives for malaria; arglabin in Kazakhstan) or standardized extracts of specific species regulated in individual jurisdictions (e.g., European Medicines Agency monographs for chamomile, arnica, calendula, and milk thistle).

8. Safety Considerations and Interactions

8.1 Allergic Contact Dermatitis (Compositae Dermatitis)

Asteraceae plants are a documented and clinically important cause of allergic contact dermatitis. In particular, sesquiterpene lactones (SLs) may cause sensitization resulting in skin irritation and inflammation. The Asteraceae-related allergy symptoms involve eczema, hay fever, asthma, or even anaphylaxis.

Asteraceae plants can elicit both immediate and delayed hypersensitivity reactions; for instance, exposure to ragweed pollen may cause an IgE-mediated type I HSR manifesting as allergic rhinitis or a type IV HSR manifesting as airborne allergic contact dermatitis. The main contact allergens present in Asteraceae plants are sesquiterpene lactones, which are found in the leaves, stems, flowers, and pollen.

Patch testing for specific members of the Asteraceae family can be complicated, given the high rate of cross-sensitization among the sesquiterpene lactones. Since SLs have similar chemical structures, the immune system of a patient sensitized to one SL can recognize the structure of another SL, resulting in a positive patch test.

Compositae allergy usually persists lifelong, but dermatitis should clear once the skin is no longer exposed to the plants that are responsible for it. Cosmetics and creams containing compositae products should not be used. However, most affected individuals may safely eat vegetables of the compositae family.

8.2 Systemic Allergic Reactions from Ingestion

Patients with Compositae sensitization are routinely warned against the ingestion of vegetables, spices, teas, and herbal remedies from this family of plants. The evidence for the occurrence of systemic allergic dermatitis caused by sesquiterpene lactone-containing plants is mostly anecdotal and based on statements from patients rather than scientific data. However, a few clinical reports on accidental sensitization and exposure and oral challenge prove the existence of this kind of reaction, most convincingly for strong contact allergens such as costunolide in bay leaves, and less so for weak allergens such as those of lettuce.

Other Compositae species suspected of causing systemic reactions are artichoke, mugwort, yarrow, dandelion, feverfew, and elecampane. Some Compositae vegetables and teas, such as lettuce and chamomile tea, may induce systemic reactions through both humoral and cell-mediated mechanisms.

8.3 Tansy and Specific Toxic Species

Tanacetum vulgare (tansy) contains β-thujone, a compound reported to be highly toxic to brain, liver, and kidney tissues. Irritant contact dermatitis has been documented after prolonged exposure to tansy. Allergy for tansy herb has been evidenced in 60.6–77.0% of individuals sensitive to Asteraceae.

8.4 Diagnostic Testing and Cross-Reactivity

Two preparations are currently in use for the diagnosis of allergic contact dermatitis caused by Asteraceae: (i) Sesquiterpene lactone (SL) mix [three pure sesquiterpene lactones], whose use has been questioned owing to an insufficient rate of true-positive results; and (ii) Compositae mix, consisting of five Asteraceae extracts, which is problematic because of lack of standardization and questionable reproducibility. An 8-year experience in Denmark using both SL mix and Compositae mix — a 6% petroleum mix of chamomile, tansy, yarrow, arnica, and feverfew extracts — has been reported.

8.5 Gastrointestinal Adverse Effects of Inulin

Variations in dose, degree of polymerization (DP), host condition, and baseline microbiota composition have contributed to inconsistent or even adverse responses across inulin studies. At higher doses, inulin-type fructans can cause flatulence, bloating, and diarrhea due to rapid fermentation in the colon.

8.6 Pollen Allergy and Asthma

Members of Asteraceae, particularly ragweed (Ambrosia spp.) and mugwort (Artemisia spp.), are among the most clinically significant sources of aeroallergens worldwide. Individuals are frequently unaware of their contact with Asteraceae because some species produce copious amounts of airborne pollens, resulting in inhalation exposure. Cross-reactivity between Asteraceae pollen and certain foods (e.g., mugwort-celery-spice syndrome) is documented but varies by region.

8.7 Drug Interactions

Patients allergic to sesquiterpene lactone mix may react to the plant or pollen, as well as cosmetics, ointments, creams, lotions, and topical medicaments that use these plant extracts. Sesquiterpene lactone is found in many plants from the Asteraceae family. Because many Asteraceae-derived phytochemicals (particularly flavonoids such as quercetin and compounds in chamomile, milk thistle, and dandelion) interact with cytochrome P450 enzymes, pharmacokinetic drug–herb interactions are possible but require species-specific evaluation.

9. Research Limitations and Evidence Gaps

A few studies related to active compounds testing in animal models, but pharmacokinetics/pharmacodynamics in laboratory animals and clinical trials are warranted to investigate their effects, including the mechanisms of action. Based on the evidence-based review on the use of medicinal plants from the plant family of Asteraceae and Lamiaceae in cardiovascular diseases, information from the review is hoped to facilitate future research initiatives to develop new medicinal plant-based medication for cardiovascular disease treatment or continue with any clinical studies to prove the effectiveness of these medicinal plants upon humans.

Although there is some evidence for differing effects of ITF based on chain length, the lack of direct comparisons and detailed descriptions of physicochemical properties limits the ability to draw conclusions from human clinical studies.

The central challenge in evaluating Asteraceae as a medicinal resource is that the family encompasses tens of thousands of species, dozens of clinically relevant genera, and hundreds of bioactive compounds. Evidence quality ranges from highly validated (artemisinin for malaria) to entirely preclinical (most individual species). Extrapolating evidence across the family as a whole would be scientifically unjustified.