IngredientsChlorogenin is a steroidal sapogenin — the aglycone (sugar-free core) that remains after hydrolysis of certain steroidal saponins. It is formally characterised as (25R)-5α-spirostane-3β,6α-diol, a spirostanol skeleton carrying two hydroxyl groups. Its molecular formula is C27H44O4, and it is registered in PubChem under CID 12303065. The CAS Registry Number is 562-34-5, and the compound possesses the InChIKey PZNPHSFXILSZTM-JUGSJECZSA-N. A structurally distinct but closely related epimer is known as β-chlorogenin (PubChem CID 10717615), which shares the same molecular formula but differs in stereochemical configuration.
Sapogenins such as chlorogenin are the aglycones (non-saccharide moieties) of saponins, and they contain steroid or other triterpene frameworks as their key organic feature. Surface activity responsible for foaming properties, as well as some other biological functions including haemolytic activity, are attributed to characteristic structural features of saponins and their amphiphilic nature, which results from the presence of a hydrophilic sugar moiety and a hydrophobic genin (the sapogenin). In chlorogenin-based saponins, the sugar chain is typically attached at the C-3 position of the sapogenin core.
Chlorogenin is distributed across several genera of the monocotyledon families, most notably Agavaceae/Asparagaceae, Amaryllidaceae (including Allium), and Solanaceae. Steroidal saponins, the glycosylated forms from which chlorogenin is obtained as an aglycone, are mostly distributed among monocotyledon families such as Asparagaceae, Amaryllidaceae, Dioscoreaceae, Smilacaceae, and Liliaceae.
Key documented botanical sources include:
The genus Agave comprises more than 400 species with geographical presence in the tropical and subtropical regions of the world; these plants have a rich history of folkloric use and are known for a wide spectrum of applications; secondary metabolites of diverse chemical classes have been reported from Agave species; owing to their pharmacological significance, the steroidal saponins of Agave have caught the attention of phytochemists, biologists, and drug discovery scientists; a comprehensive review describes 141 steroidal saponins and sapogenins from Agave covering the literature from 1970 to 2015.
Chlorogenin itself is the sapogenin aglycone; in nature it is found almost exclusively in the glycosylated (saponin) form. The most studied glycoside forms include chlorogenin 3-O-β-chacotrioside (bearing the trisaccharide α-L-rhamnopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→4)]-β-D-glucopyranose), various hexasaccharides, and mono- or diglycosides. Spirostanosides bear one sugar chain, generally at the C-3 position, and furostanosides bear two sugar chains, one at C-3 and the other at C-26. In research settings, chlorogenin is obtained by acid or enzymatic hydrolysis of saponin-containing plant extracts, then purified chromatographically. No pharmaceutical preparation or registered dietary supplement containing isolated chlorogenin as a primary active ingredient exists as of the current scientific literature.
The most extensively documented traditional use of a chlorogenin-containing plant involves Chlorogalum pomeridianum (soaproot or amole), a bulbous perennial herb native to California and Oregon. Called "wavyleaf soap plant," "soap root," or "amole," it is a low-growing plant of California and Oregon used as soap by local peoples. This plant has multiple uses among many California Indian tribes; the bulb was gathered historically in large quantities with a digging stick and is still harvested today by various cultural groups; traditionally the bulbs were highly valued for soap for washing the body, hair, baskets, and utensils among the Luiseno, Pomo, Miwok, Yuki, Western Mono, Karuk, Wiyot, Tubatulabal, Foothill Yokuts, Cahuilla, and most other cultural groups.
The crushed bulb could be rubbed on the body to relieve rheumatic pains and cramps, and perhaps as a salve for poison oak rashes. The bulbs were also cooked by slow roasting in ground-pits: for the Native Americans, they were a good food source of starch; the cooked bulbs contained fiber that could be made into small brushes; the bulbs were made into poultices used on sores; and the thick juice obtained from the cooking was used as a glue to attach feathers to arrow shafts.
The bulb also served as an important fish poison — the bulb being mashed and placed into quiet pools of water to cause fish to become immobilised and float to the water surface. Saponins are much more toxic to some other animals than to humans; fish are particularly susceptible, and the bulb juices were used to kill or stun them so they could be caught easily. The saponin-mediated ichthyotoxicity is a well-documented phenomenon attributed to the membrane-disrupting properties of steroidal saponins.
Some saponin-containing plants have been employed for hundreds of years as soaps, and this fact is reflected in their common names: soapwort (Saponaria officinalis), soaproot (Chlorogalum pomeridianum), soapbark (Quillaja saponaria), soapberry (Sapindus saponaria), and soapnut (Sapindus mukurossi).
The genus Agave comprises more than 400 species with geographical presence in the tropical and subtropical regions of the world, and these plants have a rich history of folkloric use and are known for a wide spectrum of applications. Agave is well known for the occurrence of steroidal saponins; investigation of the genus has shown diverse biological activities attributed to these plants, including analgesic, anti-inflammatory, and anticancer activities. Specific ethnobotanical records describe the use of Agave species in Mexico and the Caribbean for wound healing, as cathartics, and as topical treatments for skin conditions, with steroidal saponins and their sapogenins (including chlorogenin) now understood to contribute to these effects.
Chlorogenin-containing plants within the Allium genus have a long history in East Asian medicinal systems. Steroidal sapogenins and saponins have been identified so far in over 40 different Allium species. Common garlic (Allium sativum), leek, and related species have been used in Traditional Chinese Medicine and other Asian systems for millennia for a broad range of purposes including cardiovascular support, anti-infective applications, and digestive health. The discovery that β-chlorogenin is present in garlic saponin fractions provides a phytochemical context for some of these traditional uses, although historical practitioners did not differentiate individual saponin constituents.
Chlorogenin belongs to the spirostanol sub-class of steroidal sapogenins. Some steroidal sapogenins can serve as a practical starting point for the semisynthesis of particular steroid hormones. The spirostanol framework consists of a tetracyclic steroidal skeleton (rings A–D) with two additional oxygen-containing rings (E and F) forming the characteristic spiroketal moiety at C-22 and C-25. The two hydroxyl groups of chlorogenin are located at C-3β and C-6α, distinguishing it from closely related sapogenins such as hecogenin (which carries a ketone at C-12) and tigogenin (which has only a C-3β hydroxyl).
Naturally occurring spirostanol saponins bear a chacotriose — α-L-rhamnopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→4)]-β-D-glucopyranose — residue as the oligosaccharide moiety, which is believed to be important for biological activity.
Most importantly, steroidal saponins and their sapogenins are used as substrates in the production of steroid hormones and drugs. Chlorogenin itself is considered a potential precursor in steroid synthesis programmes, in a manner analogous to diosgenin from Dioscorea species. Steroidal saponins exhibit diverse pharmacological ability including antimicrobial, anti-inflammatory, cAMP phosphodiesterase inhibitory, antiadipogenic, bactericidal, cardioprotective, antitumour, antidiabetic, cytotoxic, antifungal, antiviral, antioxidant, and hepatoprotective activities.
Glycosylation of natural products may affect solubility, stability, or molecular recognition associated with the biological target. This principle is particularly relevant for chlorogenin, where the number and sequence of sugar residues on the sapogenin core profoundly determines the biological activity profile of the resulting saponin. Chlorogenin diglycosides have been found biologically inactive in certain assays, while the corresponding hexasaccharides are potently cytotoxic. Chlorogenin 3-O-β-chacotrioside and its derivatives have been reported to be potent entry inhibitors of the H5N1 influenza virus, and structure–activity relationship studies indicated that the sugar part is important for bioactivity.
Surface activity responsible for foaming properties, as well as some other biological functions including haemolytic activity, are attributed to the amphiphilic nature of saponins, which results from the presence of a hydrophilic sugar moiety and a hydrophobic sapogenin. This amphiphilicity allows saponins to intercalate into lipid bilayers, which underpins both their cytotoxic and cell-membrane-disrupting properties. This property is derived from the affinity of some saponins for binding cholesterol, forming insoluble pores composed of the sterol and saponins.
Most of the biological activities of Agave genus steroidal saponins are attributed to the presence of steroidal saponins capable of inhibiting tumour cell growth by cell cycle arrest. In the case of the chlorogenin hexasaccharide isolated from Agave fourcroydes, the new saponin as well as known hexasaccharides showed cytotoxicity against HeLa cells, and the compound exhibited a cell cycle inhibitory effect at the G2/M stage at concentrations of 7.5 and 10 μg/mL.
A β-chlorogenin glycoside isolated from the bulbs of Allium ampeloprasum var. porrum demonstrated in vivo anti-inflammatory and gastroprotective effects in a carrageenan-induced oedema assay and by measuring acute gastric lesions induced by acidified ethanol. The saponin administered orally at 100 mg/kg inhibited oedema formation similarly to dexamethasone at 25 mg/kg; the cytoprotective activity of the β-chlorogenin glycoside also resulted in a significant reduction in gastric hyperaemia and in the severity and number of lesions.
The prevention treatment pattern showed the strongest inhibitory effects compared to other patterns, suggesting that chlorogenin 3-O-β-chacotrioside derivatives act on the entry process at the early stages of H5N1 viral infection; further studies through hemagglutinin inhibition (HI) and neuraminidase inhibitory (NAI) assays confirmed that these derivatives inhibited H5N1 virus replication by interfering with the viral hemagglutinin function. The derivatives recognised specifically HA protein with binding affinity constant KD values of 2.57 × 10−4 M and 3.67 × 10−4 M; through site-directed mutagenesis combined with a pseudovirion system, the high-affinity docking sites were identified as closely associated with amino acid residues I391 and T395 of HA, although the potential binding sites did not locate at HA1 sialic acid receptor binding domain (RBD).
Saponins are characterised by their hemolytic activity and foaming properties and are responsible for imparting a bitter taste and astringency; saponins are very poorly absorbed; most form insoluble complexes with 3-β-hydroxysteroids and are known to interact with and form large mixed micelles with bile acids and cholesterol. This interaction with cholesterol and bile acids is considered relevant to the potential lipid-modulating properties of steroidal saponin-containing preparations, though direct evidence for chlorogenin-specific effects on this pathway in humans is not established.
Preclinical (in vitro) evidence — Strength: preliminary, cell-line data only, no human studies
The importance of the number of sugar moieties in a sugar chain and the structure of the aglycone was confirmed in studies on saponins isolated from Agave fourcroydes: chlorogenin, hecogenin, and tigogenin hexasaccharides (with the same sequence of sugar chains) showed cytotoxic activity against HeLa cells with IC50 values of 13.1, 5.2, and 4.8 μg/mL, respectively, while diglucosides were inactive (Ohtsuki et al. 2004).
A new chlorogenin hexasaccharide was isolated from leaves of Agave fourcroydes (Agavaceae); the structure was elucidated as chlorogenin 3-O-[α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→3)-[β-D-glucopyranosyl-(1→3)-β-D-glucopyranosyl-(1→2)]-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside]; this new saponin as well as known hexasaccharides showed cytotoxicity against HeLa cells, and the compound exhibited a cell cycle inhibitory effect at the G2/M stage at concentrations of 7.5 and 10 μg/mL.
Chlorogenin and hecogenin hexaglycosides isolated from Agave fourcroydes leaves were cytotoxic on HeLa cells (Takashi et al. 2004). These data are all from in vitro cell-line experiments. No in vivo animal studies or human clinical trials specifically addressing chlorogenin's anticancer activity have been identified in the peer-reviewed literature reviewed here.
Evidence: in vivo animal studies; no human clinical trials identified
A β-chlorogenin glycoside isolated from the bulbs of Allium ampeloprasum var. porrum demonstrated in vivo anti-inflammatory and gastroprotective effects in a carrageenan-induced oedema assay and by measuring acute gastric lesions induced by acidified ethanol (Adão et al. 2011); the saponin administered orally at 100 mg/kg inhibited oedema formation similarly to dexamethasone at 25 mg/kg; cytoprotective activity of the β-chlorogenin glycoside resulted in a significant reduction in gastric hyperaemia and in the severity and number of lesions.
More broadly, investigation of the genus Agave showed diverse biological activities including analgesic, anti-inflammatory, and anticancer activities. Using the carrageenan-induced oedema model, the aqueous extract from A. americana and a sapogenin-enriched fraction extract (hecogenin and tigogenin) showed anti-inflammatory effects, with 50% and 70–100% inhibition of oedema, respectively. These animal-model results have not been translated into human clinical trials specific to chlorogenin.
Evidence: in vitro and synthetic derivative studies only; no clinical trials
A distinct body of research has focussed on chlorogenin 3-O-β-chacotrioside and synthetic analogues as inhibitors of highly pathogenic avian influenza H5N1 virus. The objective of this work was to investigate the inhibitory effect of chlorogenin 3-O-β-chacotrioside derivatives against H5N1 subtype of highly pathogenic avian influenza (HPAI) viruses and their molecular mechanism; a series of novel small molecule derivatives were designed and synthesised and their antiviral activities were detected; results showed that derivatives UA-Nu-ph-5, XC-27-1 and XC-27-2 strongly inhibited wild-type A/Duck/Guangdong/212/2004 H5N1 viruses with IC50 values of 15.59 ± 2.4 μM, 16.83 ± 1.45 μM, and 12.45 ± 2.27 μM, respectively, with selectivity index (SI) > 3.
These study data manifested that chlorogenin 3-O-β-chacotrioside derivatives generated antiviral effects against HPAI H5N1 viruses by targeting the hemagglutinin fusion machinery. The structure–activity relationship study indicated that the sugar part is important for bioactivity. All studies in this area have been conducted in cell-based or pseudovirus assay systems; no in vivo or human data exist.
Evidence: in vitro and ethnobotanical; no controlled clinical trials
The saponin-forming tendency of chlorogenin's glycosides provides a physicochemical basis for their historical use as soaps and cleansing agents. Apart from sulfur compounds, steroidal saponins from Allium species are important biologically active molecules considered to be responsible for the observed antifungal, cytotoxic, enzyme-inhibitory, and other activities of these plants. Some steroidal saponins have shown promising antifungal, cytotoxic, anti-inflammatory, antithrombotic, and hypocholesterolemic effects. No studies isolating and testing chlorogenin specifically for antifungal efficacy in controlled clinical settings have been identified.
Some steroidal sapogenins can serve as a practical starting point for the semisynthesis of particular steroid hormones. Most importantly, steroidal saponins and sapogenins are used as substrates in the production of steroid hormones and drugs. Chlorogenin's spirostanol core, bearing accessible hydroxyl groups at C-3 and C-6, makes it a candidate starting material for partial synthesis of pharmacologically relevant steroids, although this application is primarily of industrial and pharmaceutical chemistry interest rather than dietary supplement use.
Chlorogenin as an isolated sapogenin is not available as a defined dietary supplement in standardised dose forms. In the peer-reviewed studies reviewed, the following specific dosages or concentrations were reported:
No human clinical dose-ranging studies for chlorogenin or its glycosides have been identified in the available peer-reviewed literature.
Saponins are characterised by their hemolytic activity and foaming properties; saponins are very poorly absorbed. This low oral bioavailability substantially reduces systemic toxicity risk from orally administered saponin-containing preparations. The saponins in Chlorogalum bulbs make these poisonous when eaten raw; however, saponins are very poorly absorbed by the body and usually pass straight through, and in any case they can be destroyed by thorough cooking.
The saponin aglycone structure is believed to play a role in haemolysis as this core has an affinity for cholesterol; the steroidal saponin structural subclass has higher haemolytic activity and haemolysis occurs at a faster rate compared to triterpenoid saponins. Although the haemolytic properties of saponins have been well documented, several saponins are now known to have little or no haemolytic activity. Parenteral (intravenous or intramuscular) administration of saponins poses a significantly higher haemolytic risk than oral administration.
Saponins are much more toxic to some other animals than they are to humans; fish are particularly susceptible, and the bulb juices of Chlorogalum pomeridianum were used to kill or stun fish so they could be caught easily. This differential toxicity reflects the differing sensitivity of gill membranes versus mammalian gastrointestinal mucosa to saponin-mediated membrane disruption.
Most saponins form insoluble complexes with 3-β-hydroxysteroids and are known to interact and form large mixed micelles with bile acids and cholesterol; although saponins were shown to lower cholesterol in some animal species, the hypocholesterolaemic effects of saponins in humans are more speculative; in addition, they form insoluble saponin–mineral complexes with iron, zinc, and calcium. Long-term or high-dose oral intake of saponin-rich preparations may therefore theoretically impair absorption of these minerals, though this has not been specifically studied for chlorogenin preparations.
No dedicated human safety, tolerability, or pharmacokinetic studies for isolated chlorogenin or its direct glycosides have been identified in the peer-reviewed literature to date. All mechanistic and preclinical data remain at the cell-culture or animal-model stage. Accordingly, established human safety thresholds, maximum recommended doses, or formally characterised drug-interaction profiles for chlorogenin do not exist in the current scientific record.
The totality of published evidence on chlorogenin is at an early, predominantly preclinical stage. Cytotoxic activity against cancer cell lines (HeLa), anti-inflammatory and gastroprotective effects in rodent models, and antiviral activity of synthetic chlorogenin derivatives against H5N1 viruses in cell-based assays represent the best-characterised findings. There are numerous reports referring to pharmacological activities of steroidal saponins, and some of them showed promising antifungal, cytotoxic, anti-inflammatory, antithrombotic, and hypocholesterolaemic effects. However, no randomised controlled trials or systematic human clinical investigations of chlorogenin per se have been conducted. Evidence strength across all areas of activity studied must be classified as preliminary to moderate for in vitro/in vivo animal research, and absent for human clinical evidence. Chlorogenin is not currently recognised by any regulatory body (EMA, EFSA, NIH, WHO) as an approved ingredient for any therapeutic indication.
Health conditions that Chlorogenin may help support.
Body systems that Chlorogenin may help support.
Go back