Apocarotenal

Other Names

(2E,4E,6E,8E,10E,12E,14E,16E)-2,6,11,15-tetramethyl-17-(2,6,6-trimethylcyclohex-1-en-1-yl)heptadeca-2,4,6,8,10,12,14,16-octaenal(all-E)-8'-apo-β-caroten-8'-al2,4,6,8,10,12,14,16-Heptadecaoctaenal, 2,6,11,15-tetramethyl-17-(2,6,6-trimethyl-1-cyclohexen-1-yl)-, (2E,4E,6E,8E,10E,12E,14E,16E)-8'-Apo-beta-caroten-8'-al8'-Apo-beta-carotenal8'-apo-ß-carotene-al8'-apo-β,ψ-caroten-8'-al8'-Apo-β,ψ-carotenal8'-apo-β-carotenal8'-Apoaldehydeall-trans-8'-apo-β-carotenalall-trans-beta-Apo-8'-carotenalall-trans-β-apo-8'-carotenalbeta-apo-8'-carotenalC Orange 16C.I. 40820C.I. Food Orange 6CarotenalCI 40820CI Food Orange 6E 160eE160eEINECS 214-171-6Food Orange 6INS No. 160eß-Apo-8'-carotenaltrans-8'-apo-β-caroten-8'-altrans-beta-apo-8'-carotenaltrans-β-apo-8'-carotenalβ-apo-8'-carotenalβ-Apo-8'-carotenal (C30)β-apo-Carotenalβ-Apocarotenal

Synopsis

Apocarotenal (β-Apo-8′-Carotenal): A Comprehensive Reference

1. Identity, Nomenclature, and Physical Properties

Apocarotenal, systematically designated β-apo-8′-carotenal and also known by its IUPAC name (all-E)-8′-apo-β-caroten-8′-al, is an orange to orange-red carotenoid aldehyde belonging to the family of apocarotenoids — shorter-chain cleavage products derived from full-length C40 carotenoids. Its preferred IUPAC name is (all-E)-8′-apo-β-caroten-8′-al, reflecting its systematic nomenclature as (2E,4E,6E,8E,10E,12E,14E,16E)-2,6,11,15-tetramethyl-17-(2,6,6-trimethylcyclohex-1-en-1-yl)heptadeca-2,4,6,8,10,12,14,16-octaenal. Additional synonyms in commercial and regulatory contexts include Food Orange 6 and trans-β-Apo-8′-carotenal.

The empirical chemical formula for apocarotenal is C₃₀H₄₀O. It has a molecular weight of 416.64 g/mol. This structure is derived from β-carotene (C₄₀H₅₆) through oxidative cleavage of the polyene chain at the 8′ position, which shortens the molecule by removing a portion of the chain and one ionone ring, while introducing the aldehyde group via oxidation. In comparison to its parent compound β-carotene, apocarotenal features a reduced chain length (from C40 to C30) and the distinctive aldehyde functionality, which alters its chemical behavior while retaining the characteristic conjugated polyene system.

This compound is poorly soluble in water but readily dissolves in oils and organic solvents like chloroform (approximately 1 mg/mL), with a melting point ranging from 136°C to 141°C (decomposition). Due to their chemical structure with long carbon chains, carotenoids including apocarotenal are mostly oil-soluble. Emulsified, water-dispersible preparations are also available.

The CAS registry number for apocarotenal is 1107-26-2. Apocarotenal has an orange to orange-red colour and is used in foods, pharmaceuticals, and cosmetic products. Depending on the product form, apocarotenal is used in fat-based foods (such as margarine, sauces, and salad dressing), beverages, dairy products, and sweets. Its E number is E160e and it is approved for use as a food additive in the US, EU, Australia, and New Zealand.

2. Natural Sources and Occurrence

Apocarotenal, or trans-β-apo-8′-carotenal, is a carotenoid found in spinach and citrus fruits. It occurs naturally as a cleavage product of β-carotene in various plants, particularly those rich in carotenoids, and is present in trace amounts in citrus fruits such as oranges and mandarins. Green leafy vegetables also serve as sources, with apocarotenal found in spinach and similar low concentrations reported in kale and other greens such as broccoli. These natural levels are generally low, often too minimal to significantly contribute to pigmentation in foods or animal tissues without supplementation.

Studies have also revealed the presence of other apocarotenoids in foods including green leafy vegetables, non-green vegetables, cereal grains, fruits, and soft drinks, although in concentrations markedly lower than those of the parent carotenoids from which they are derived. Apocarotenal can arise both from the metabolism of β-carotene inside living organisms and from non-biological processes during food preparation. β-Apocarotenoids can be formed via autoxidation, thermal degradation of β-carotene, or during food processing. It is generally accepted that oxidation of carotenoids begins with epoxidation and cleavage to apocarotenals.

Commercially produced through chemical synthesis from β-carotene or natural sources, apocarotenal is valued for its stability in food processing, providing a vibrant hue similar to annatto but with greater heat and light resistance. While a natural form is not available in the marketplace, apocarotenal is a highly stable, orange to orange-red molecule used for coloration in foods and beverages. Synthetic but "nature-identical" carotenoids are also available as food colorants, principally β-carotene and β-apocarotenal. These are generally used in oil-based systems but may also be made water-dispersible by physical means (emulsification and encapsulation), and thus are commonly used for coloring cloudy-orange soft drinks.

3. Historical Discovery and Development

Apocarotenal, specifically β-apo-8′-carotenal, emerged as a key compound in the mid-20th century through investigations into the metabolism of β-carotene, a prominent member of the carotenoid family responsible for pigmentation and provitamin A activity in plants and animals. Early studies on carotenoid cleavage revealed that oxidative breakdown of β-carotene could produce apocarotenals, including β-apo-8′-carotenal, as eccentric cleavage products. The first in vitro demonstrations of enzymatic cleavage of β-carotene occurred in 1965, primarily showing central cleavage to retinal and highlighting pathways in vitamin A biosynthesis, with later research identifying enzymes for eccentric cleavages leading to apocarotenoids. Building on these metabolic insights, researchers in the 1950s and 1960s synthesized and structurally identified β-apo-8′-carotenal to explore its provitamin A potential and chemical properties relative to full-length carotenoids.

Regulatory milestones followed soon after, with the U.S. Food and Drug Administration (FDA) approving β-apo-8′-carotenal as a color additive for foods in 1963, recognizing its safety and utility in enhancing product coloration without certification requirements. In Europe, it was authorized as the food additive E160e in the 1970s, following evaluations by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) in 1974, which established an initial acceptable daily intake (ADI). β-Apo-8′-carotenal was previously evaluated by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) in 1974 and the EU Scientific Committee for Food (SCF) in 1975 and 2000. Both committees established an Acceptable Daily Intake (ADI) of 0–5 mg/kg bw/day, which was withdrawn by the SCF in 2000.

The use of carotenoids as colorants has ancient precedent in the use of plant-derived pigments, though apocarotenal itself as an isolated compound is a product of mid-20th century chemistry. Its application as a food colorant has been driven principally by its natural origin from β-carotene, its intense orange-red hue, and its regulatory acceptance across major international jurisdictions.

4. Key Constituents, Biochemistry, and Mechanisms of Action

4.1 Chemical Structure and Chromophore

Apocarotenal has the molecular formula C₃₀H₄₀O and possesses a linear polyene chain consisting of 9 conjugated double bonds, with a β-ionone ring (a cyclohexene ring substituted with methyl groups) at one terminus and an aldehyde functional group (–CHO) at the other. Apocarotenal functions through its conjugated double-bond system, which absorbs light in the visible range, imparting color to formulations.

4.2 Biosynthetic and Metabolic Formation

The first metabolic pathway for apocarotenoid synthesis is mediated by the enzymes β,β-carotene-15,15′-dioxygenase (BCO1) and β,β-carotene-9′,10′-dioxygenase (BCO2), which cleave carotenoids into smaller compounds called apocarotenoids. Mammals express an enzyme (referred to as β,β-carotene 9′,10′-dioxygenase, BCO2) that catalyzes the eccentric cleavage (at both the 9,10 and 9′,10′ double bonds) of both provitamin A carotenoids and non-provitamin A carotenoids, producing both non-volatile apocarotenoids and volatile compounds. The apocarotenoids stemming from the oxidative cleavage of dietary carotenoids are attracting much attention because they may contribute to positive health-promoting actions by mechanisms such as the intervention in cell signaling pathways.

Apocarotenoids are also formed nonenzymatically via chemical oxidation during food processing and cooking or in tissues under conditions of oxidative stress. Collectively, studies suggest that β-apocarotenals are formed as products of β-carotene oxidation in vivo. Oxidation products identified by chemical methods include β-apo-8′-carotenal, β-apo-10′-carotenal, β-apo-12′-carotenal, β-apo-14′-carotenal and β-apo-15-carotenal, along with semi-β-carotenone and monohydroxy-β-carotene-5,8-epoxide.

4.3 Provitamin A Activity

Like other carotenoids, apocarotenal plays a role as a precursor of vitamin A, even though it has 50% less pro-vitamin A activity than β-carotene. Unlike symmetric provitamins like β-carotene, which yield two retinal molecules, apocarotenal's metabolism results in one retinal per molecule, limiting its overall yield but still providing significant provitamin A activity. Some carotenoids (β-carotene, apocarotenal) have vitamin A activity, as well as antioxidant activity in vitro and in vivo.

4.4 Intestinal Uptake and Metabolic Fate

A study using differentiated Caco-2 intestinal cells (a standard in vitro model for intestinal absorption) investigated the uptake and metabolism of β-apo-8′-carotenal alongside other β-apocarotenoids. In that model, there was rapid uptake of β-apo-8′-carotenal into cells, and β-apo-8′-carotenal was largely converted to β-apo-8′-carotenoic acid and a minor metabolite identified as 5,6-epoxy-β-apo-8′-carotenol. β-Apo-8′-carotenal was largely converted to β-apo-8′-carotenoic acid. Several studies show that this apocarotenoic acid is a major metabolite present in the serum and tissues of animals fed β-apo-8′-carotenal. This metabolic conversion is similar to what is observed with retinal, which can be converted to retinol or retinoic acid.

These results suggest that dietary β-apocarotenals are extensively metabolized in intestinal cells via pathways similar to the metabolism of retinal. Thus, they are likely not absorbed directly from the diet. The absorption of apocarotenal, like other carotenoids, is enhanced in the presence of dietary fats, which facilitate micelle formation and uptake into intestinal cells.

4.5 Nuclear Receptor Interactions and Gene-Regulatory Effects

The mechanism of action of apocarotenoids in mammals is not fully worked out. However, they have profound effects on gene expression and work, at least in part, through the modulation of ligand-activated nuclear receptors. Research published in the Journal of Biological Chemistry has contributed significantly to understanding the molecular biology of the apocarotenoid class to which β-apo-8′-carotenal belongs.

Reporter gene assays showed that none of the β-apocarotenoids significantly activated retinoic acid receptors (RARs). Importantly, however, β-apo-14′-carotenal, β-apo-14′-carotenoic acid, and β-apo-13-carotenone antagonized ATRA-induced transactivation of RARs. Specifically regarding β-apo-8′-carotenal, studies found that none of the apocarotenoids tested showed significant transactivation activity for the RARs when compared with all-trans retinoic acid (RA), suggesting that biological effects of these apocarotenoids are through mechanisms other than activation of RARα and β. The fold inductions by apo-8′-carotenoic acid were positively correlated with compound concentration, suggesting that apo-8′-carotenoic acid may be a weak RARα ligand.

Transactivation assays were also performed to determine whether apocarotenoids activate or antagonize retinoid X receptor (RXR) α. Reporter gene constructs and retinoid receptor (RXRα) were transfected into cells for quantitative assays. None of the β-apocarotenoids significantly activated RXRα. These findings suggest that a possible biological function of β-apocarotenoids is their ability to interfere with nuclear receptor signaling. Recent work showed that β-apo-13-carotenone is also a high-affinity antagonist of all three retinoic acid receptors (RARα, RARβ, and RARγ).

These findings suggest that β-apocarotenoids function as naturally occurring retinoid antagonists. The antagonism of retinoid signaling by these metabolites may have implications for the activities of dietary β-carotene as a provitamin A and as a modulator of risk for cardiovascular disease and cancer. It must be emphasized that much of this mechanistic work involves shorter-chain β-apocarotenoids and is based on in vitro assays; the extent to which these findings apply to β-apo-8′-carotenal specifically in vivo remains under investigation.

4.6 Antioxidant Properties

Apocarotenal has been described as a carotenoid with both genotoxic and antioxidant activities and is an active metabolite of β-carotene. The antioxidant capacity of the carotenoid class broadly derives from the conjugated polyene system that allows these molecules to absorb and quench singlet oxygen and free radicals. The mechanism of action of the health benefits of dietary carotenoids remains unclear, except for their provitamin A activity. A plethora of cellular metabolic and signaling pathways have been reported to be modulated by apocarotenoids in vitro and in vivo, resulting in beneficial effects for almost all organs in the body. Nevertheless, their molecular mechanisms of action have not been fully elucidated.

5. Scientific Evidence by Area of Use

5.1 Provitamin A and Vitamin A Metabolism

The most well-established biological function of apocarotenal is its capacity to serve as a precursor to vitamin A in the diet. This is established both biochemically and from animal studies. The best-characterized apocarotenoids are retinoids (vitamin A and its derivatives) generated upon central oxidative cleavage of provitamin A carotenoids, mainly β-carotene. Studies in animal models confirm that apocarotenal elevates plasma retinol levels comparably to other apocarotenoids when consumed in diets.

In mice, knock-out models demonstrated the central importance of BCO1 in this conversion. This study revealed that BCO1 is critical for retinoid homeostasis. Genetic disruption of BCO1 resulted in β-carotene accumulation and vitamin A deficiency accompanied by a BCO2-dependent production of minor amounts of β-apo-10′-carotenol. BCO1 action prevents the accumulation of long-chain β-apocarotenoids in blood and tissues that may interact with components of vitamin A metabolic pathways. Simultaneously, this BCO1 activity ensures that even long-chain β-apocarotenoids can be utilized for vitamin A production.

Evidence strength: Mechanistic and animal-model data are robust; direct, dedicated clinical trials in humans on apocarotenal specifically as a vitamin A source are limited, and evidence in humans is largely extrapolated from broader research on provitamin A carotenoids.

5.2 Antioxidant Activity and Oxidative Stress

Apocarotenal's extended conjugated polyene system underpins its capacity to quench reactive oxygen species. Some carotenoids including apocarotenal have antioxidant activity in vitro and in vivo. In ocular health, apocarotenal's presence in natural sources contributes to antioxidant capacity that may reduce risks of age-related macular degeneration by scavenging reactive species in the retina. However, this remains speculative for apocarotenal per se, as the cited evidence for ocular protection primarily pertains to other carotenoids such as lutein and zeaxanthin in human studies.

In vitamin A–replete populations, increased concentrations of serum carotenoids have been associated with a decreased risk of degenerative diseases. The mechanism of action of carotenoids in determining antioxidant activity is largely unknown.

Evidence strength: In vitro antioxidant data are available for apocarotenal. Human clinical evidence specifically for apocarotenal as an antioxidant is absent; existing human data apply to carotenoids as a class, not to apocarotenal specifically.

5.3 Nuclear Receptor Signaling and Potential Relevance to Cancer Biology

A body of in vitro research has investigated whether β-apocarotenoids, including those structurally related to β-apo-8′-carotenal, can modulate retinoic acid receptor (RAR) and retinoid X receptor (RXR) signaling. Some β-apocarotenoids are potent antagonists of α, β, and γ isoforms of RARs. β-Apo-14′-carotenoic acid, β-apo-14′-carotenal, and β-apo-13-carotenone were high-affinity ligands for RARs α, β, and γ and significantly antagonized the transactivation of all three RAR isoforms by retinoic acid. These β-apocarotenoids effectively decreased the retinoic acid–induced upregulation of RARβ and cytochrome P450-26A1 in HepG2 cells.

With specific regard to β-apo-8′-carotenal itself, the evidence for RAR antagonism is less definitive than for shorter-chain β-apocarotenoids. Although the shorter products of the eccentric cleavage of β-carotene had little or no effect on ATRA-induced transactivation, β-apo-10′-carotenoic acid and β-apo-12′-carotenoic acid both led to 40–50% inhibition of ATRA-induced activation of all three RAR isoforms. The most potent RAR antagonists within the series were β-apo-14′-carotenal, β-apo-14′-carotenoic acid, and β-apo-13-carotenone, not β-apo-8′-carotenal. In addition to the well-known biological actions of vitamin A, it is becoming apparent that non-retinoid apocarotenoids also have the potential to regulate a broad spectrum of critical cellular functions, thus influencing mammalian health.

β-Apo-carotenoids including β-apo-13-carotenone and β-apo-14′-carotenal are potent retinoic acid receptor (RAR) antagonists in transactivation assays, and researchers have asked how these influence RAR-dependent processes in living cells. Treatment of 3T3-L1 adipocytes with either β-apo-13-carotenone or β-apo-10′-carotenoic acid stimulated adipocyte marker gene expression. Neither blocked the inhibitory effects of a relatively large dose of exogenous all-trans-retinoic acid on adipocyte differentiation. These data suggest that in addition to acting as transcriptional antagonists, some β-apo-carotenoids act through other mechanisms to influence 3T3-L1 adipocyte differentiation.

Evidence strength: Exclusively in vitro and animal model data. No human clinical trials on apocarotenal or closely related β-apocarotenoids for cancer prevention or treatment have been conducted. The mechanistic implications for human cancer risk or benefit remain entirely speculative.

5.4 Food Colorant Use in Pharmaceuticals and Cosmetics

Apocarotenal's utility as a colorant is well-documented across regulatory filings. In scientific applications, apocarotenal is utilized for its colorant properties in food, pharmaceutical, and cosmetic industries. In the food industry, it serves as a natural coloring agent in various products like beverages, dairy, and confectionery. Its role in pharmaceuticals includes enhancing the aesthetic appeal of tablets and capsules. Additionally, it is used in cosmetic products for its pigmentation properties, providing vibrant hues to skin care and makeup products.

6. Dosage Forms and Reported Dosages

Apocarotenal is available commercially in several physical forms dictated by its application context. Due to their chemical structure with long carbon chains, carotenoids are mostly oil-soluble. Emulsified, water-dispersible preparations are available. Typical commercial preparations include oil suspensions, water-dispersible beadlets, and emulsified liquids for use in different food matrices.

As a food colorant, specific usage limits have been established through regulatory processes. Its high color intensity allows low usage levels, typically up to 15 mg per pound of solid or semisolid food or 15 mg per pint of liquid. In the EU, β-apo-8′-carotenal is authorized as the food additive E 160e under Regulation (EC) No 1333/2008, permitted at quantum satis levels in most food categories, with specific maximum permitted levels in others such as 100 mg/kg in edible ices and fine bakery wares.

With respect to acceptable daily intake, the European Food Safety Authority (EFSA) re-evaluated it in 2012, setting an ADI of 0.05 mg/kg body weight, and revised it to 0.3 mg/kg body weight in 2014 following re-evaluation of toxicological data; refined exposure assessments confirmed intakes below the ADI, including for children.

As a provitamin A contributor, 1 mg of apocarotenal provides approximately 1,000–1,200 IU of vitamin A activity, based on its biopotency relative to retinol standards. There are no dedicated human supplementation trial dose schedules reported for apocarotenal as a standalone dietary supplement separate from its role as a food colorant.

7. Regulatory Status

Apocarotenal's E number is E160e and it is approved for use as a food additive in the US, EU, Australia, and New Zealand. In the US, it is exempt from certification and permanently listed for food additive use. Specifications under Commission Regulation (EU) No 231/2012 require at least 96% total carotenoids calculated as the trans-isomer. Apocarotenal is also approved in Australia and New Zealand under the Food Standards Code as INS 160e. Codex Alimentarius specifications for INS 160e include limits for contaminants such as lead not more than 2 mg/kg and arsenic not more than 1 mg/kg, ensuring compliance with global safety benchmarks.

8. Safety Considerations

8.1 Genotoxicity

A principal safety question that has been examined for apocarotenal is its potential genotoxicity, given that some carotenoid oxidation products show concerning activity in certain test systems. The EFSA Panel concluded that the available in vitro and in vivo genotoxicity studies do not give reason for concern with respect to genotoxicity. It was also concluded that several in vitro studies, performed with β-apo-8′-carotenal in both prokaryotic and eukaryotic test systems, do not give rise to safety concerns with respect to the genotoxicity of the compound. The EFSA FEEDAP Panel also issued an opinion on the safety of use of coloring agents including β-apo-8′-carotenal in animal nutrition. It was stated that data on the safety of β-apo-8′-carotenal for the target animals are not available, but that given the natural occurrence of the compound and considering the molecular structure of the carotenoid, the FEEDAP Panel does not see reasons for concern. It was also concluded that several in vitro studies, performed with β-apo-8′-carotenal in both prokaryotic and eukaryotic test systems, do not give rise to safety concerns with respect to the genotoxicity of the compound.

β-Apo-8′-carotenal was shown not to be mutagenic using the Ames test with Salmonella typhimurium, and no genotoxicity was observed for β-apo-8′-carotenal in cultured hamster lymphocytes exposed for 48 hours. Researchers concluded that apocarotenal at concentrations of 250 and 1000 µg/mL is not clastogenic in mammalian cell cultures.

8.2 Historical ADI and Re-evaluation

β-Apo-8′-carotenal was previously evaluated by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) in 1974 and the EU Scientific Committee for Food (SCF) in 1975 and 2000. Both committees established an ADI of 0–5 mg/kg bw/day, which was withdrawn by the SCF in 2000. A significant later event was the 2012 re-evaluation by EFSA, which reaffirmed its safety for use as a food colorant based on updated toxicological data.

8.3 Vitamin A Excess Risk

As a provitamin A compound, theoretical concerns about contribution to excessive vitamin A intake exist at high doses. Significant exceeding of the ADI may theoretically lead to excessive intake of vitamin A derivatives, potentially increasing the risk of hypervitaminosis A when combined with other sources of retinoids. This factor is taken into account by EFSA when setting usage limits for the colorant. In practice, dietary exposure from apocarotenal as a food colorant is very low and regulatory exposure assessments have consistently confirmed intakes well below the ADI.

8.4 Nuclear Receptor Antagonism — Potential Biological Implications

Research documenting that some β-apocarotenoids can antagonize retinoic acid receptors and retinoid X receptors raises a theoretical concern that high intakes could interfere with retinoic acid signaling in vivo. Findings suggest that β-apocarotenoids function as naturally occurring retinoid receptor antagonists, which may have implications for the activities of dietary β-carotene as a provitamin A and as a modulator of risk for cardiovascular disease and cancer. The mechanism of action of apocarotenoids in mammals is not fully worked out. The specific chain-length dependence of this RAR antagonism, with the shorter-chain compounds (β-apo-13-carotenone, β-apo-14′-carotenoids) being the most potent, means the relevance of this effect to β-apo-8′-carotenal at its own receptor-interaction profile remains uncertain. This is an active area of research with no definitive human safety data.

8.5 Occurrence in Animal Feed

The FEEDAP Panel concluded there are no safety concerns for the consumer from the consumption of eggs from hens fed β-apo-8′-carotenal supplemented diets. This indicates that regulatory review extends to secondary dietary exposure via animal products and has not found evidence of concern.

9. Analytical Detection

The detection and quantitation of apocarotenal in biological matrices has been technically challenging due to the very low concentrations at which it occurs naturally. Since the levels of apocarotenoids are very low relative to the parent carotenoid, it is crucial to control for the possible generation of the compounds during sample preparation and analysis. An example of a recent LC-MS/MS method developed to detect and quantitate the β-apocarotenals and the apolycopenals in foods and human plasma has a limit of quantitation (LOQ) for each of these compounds in plasma of about 50 pM. An LC/MS method detected 3–5 nM β-apo-13-carotenone in human plasma, demonstrating that β-apocarotenoids are present as endogenous compounds in human blood at very low concentrations.

10. Summary of Evidence Characterization

Provitamin A activity: Well-established biochemically; robust animal model data; limited dedicated human clinical evidence for apocarotenal per se.
Antioxidant activity: In vitro evidence present; human clinical evidence applying specifically to apocarotenal is absent.
Nuclear receptor (RAR/RXR) modulation: In vitro and cell-culture data only; no human clinical evidence; primarily relevant to shorter-chain β-apocarotenoids; significance of β-apo-8′-carotenal specifically is uncertain.
Cancer-relevant cell biology: Preliminary in vitro data only for the apocarotenoid class; no human intervention data.
Food colorant safety: Extensively reviewed by EFSA, JECFA, and the FDA; no genotoxicity concern; ADI established and regularly updated.
Overall evidence base for health claims: Weak to preliminary for all areas beyond provitamin A contribution. Apocarotenal has been studied far less than β-carotene and other major carotenoids in human populations.

References

Health Conditions

Health conditions that Apocarotenal may help support.

No conditions available.

Body Systems

Body systems that Apocarotenal may help support.

No body systems available.