Gallocatechin ((+)-Gallocatechin · Flavan-3-ol · Antioxidant · Anti-inflammatory)

Compound	(+)-Gallocatechin (GC; 3,3′,4′,5,5′,7-Hexahydroxyflavane; Gallocatechin)
Chemical class	Polyphenol — Flavan-3-ol (pyrogallol B-ring catechin; C-3 epimer of epigallocatechin)
CAS	3371-27-5
Primary source	Camellia sinensis (green tea and white tea leaves), Theobroma cacao (cocoa, minor)
Key applications	Antioxidant; anti-inflammatory; gut microbiome; cardiovascular
Claim strength	Moderate
Typical form	Green Tea Liquid Extract (catechin spectrum); EGCG 50% Green Tea Extract (GC as minor co-catechin); white tea extract
Buy from Herbuno	EGCG 50% Powder (Green Tea Extract) | Standardized Camellia sinensis → Green Tea Liquid Extract (Water Soluble) - Camellia sinensis →

Name origin: Gallocatechin is named after gallic acid (from Galla — oak gall, the historical source of gallic acid) and catechin — it is catechin with a pyrogallol B-ring (3′,4′,5′-trihydroxy) rather than the catechol B-ring (3′,4′-dihydroxy) of standard catechin. (+)-Gallocatechin (GC) is the C-3 epimer of (-)-epigallocatechin (EGC); both are non-gallated pyrogallol catechins in the green tea flavone-3-ol family. Traditional use: Gallocatechin has no independent traditional medicinal use as a compound — it is a minor constituent of green tea and white tea, occurring alongside the more abundant EGCG, EGC, ECG, epicatechin, and catechin. White tea (the least processed Camellia sinensis preparation, made from young buds and first leaves) is relatively enriched in gallocatechin compared to mature leaf preparations. Research trajectory: Gallocatechin's pyrogallol B-ring gives it superior radical scavenging capacity compared to catechol B-ring catechins (catechin, epicatechin, ECG) but similar to EGC and EGCG. It has been studied individually for antioxidant, anti-inflammatory, and anti-obesity activities, though most research is conducted on the total catechin fraction rather than GC in isolation. Commercial source: Gallocatechin is delivered as a minor constituent of EGCG 50% Green Tea Extract and Green Tea Liquid Extract from Herbuno — part of the total catechin spectrum rather than as an individually standardised compound.

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Evidence for Gallocatechin Applications

Antioxidant activity: Gallocatechin's pyrogallol B-ring (three adjacent hydroxyl groups) is among the most potent radical scavenging configurations in the flavonoid family. In DPPH, ABTS, and FRAP assays, gallocatechin performs comparably to EGCG and EGC — substantially above catechol-ring catechins (epicatechin, catechin). Superoxide dismutation, hydrogen peroxide scavenging, and lipid peroxidation inhibition are all documented. Claim strength: Moderate.

Anti-inflammatory: COX-2 and 5-LOX inhibition at micromolar concentrations are documented for gallocatechin, consistent with its structural class. NF-κB pathway suppression and reduction of TNF-α and IL-6 production in macrophage activation models parallel EGCG's anti-inflammatory profile. Claim strength: Moderate.

Gut microbiome modulation: As a non-gallated catechin, gallocatechin is less efficiently absorbed in the small intestine than its gallated counterparts, delivering a higher proportion to the colon. Colonic microbial fermentation of gallocatechin produces smaller phenolic acids (gallic acid, pyrogallol, dihydroxyphenylpropionic acids) that are well-absorbed and contribute systemic antioxidant activity. Prebiotic-type effects on Akkermansia muciniphila and Bifidobacterium populations are attributed to the pyrogallol catechin class. Claim strength: Emerging.

Anti-obesity: Gallocatechin has shown adipogenesis inhibition in 3T3-L1 preadipocyte models via PPARγ suppression and reduced lipid accumulation, consistent with the green tea catechin class broadly. Anti-obesity effects in high-fat diet animal models parallel those of the full catechin fraction. Claim strength: Emerging.

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Dosage & Formulator Specification

No isolated gallocatechin human dosing data exist. Gallocatechin is a minor component of green tea catechin preparations — typically representing 3–8% of total catechin content in green tea extract. White tea preparations may contain relatively higher gallocatechin proportions. Standard green tea extract supplementation (200–800 mg total catechins/day) delivers 6–64 mg gallocatechin as a co-catechin.

For formulator specification, gallocatechin is not separately standardised in commercial green tea extracts. Total catechin content and EGCG percentage are the standard commercial markers; HPLC catechin profiling can quantify gallocatechin individually on request. EGCG 50% Green Tea Extract and Green Tea Liquid Extract from Herbuno deliver the full catechin spectrum including gallocatechin.

Stability of gallocatechin in formulations follows the same pattern as other pyrogallol catechins — more susceptible to oxidation than catechol catechins due to the additional hydroxyl group. pH 4–6, nitrogen atmosphere, and antioxidant co-formulation (vitamin C) are standard protective measures. The compound is stable in dry powder form at ambient temperature.

No specific drug interactions are documented for gallocatechin. Class-level tea catechin considerations apply: iron chelation reducing non-haem iron absorption; weak CYP modulation at very high doses. No significant interactions at typical supplement exposure levels.

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Frequently Asked Questions — Gallocatechin

What distinguishes gallocatechin from epigallocatechin (EGC)?
Gallocatechin (GC) and epigallocatechin (EGC) are C-3 stereoisomers — both are non-gallated pyrogallol B-ring catechins, but they differ in the configuration of the hydroxyl at C-3: GC is (+) configuration (2R,3S); EGC is (-) configuration (2R,3R). This stereochemical difference affects enzyme binding geometry and gut absorption kinetics. EGC is more abundant in green tea (typically 5–10% of total catechins) versus GC (3–8%). Both have similar antioxidant and anti-inflammatory profiles.

Is gallocatechin more abundant in white tea than green tea?
Yes, relatively. White tea is made from young buds and first leaves of Camellia sinensis, harvested before full leaf development. The catechin distribution in young tea buds differs from mature leaves — gallocatechin and epigallocatechin (the non-gallated pyrogallol catechins) are proportionally higher, while EGCG (gallated pyrogallol) may be relatively lower. Absolute catechin concentrations are lower in white tea due to less leaf material per serving, but the GC:EGCG ratio favours GC relative to green tea.

What happens to gallocatechin in the gut?
Non-gallated catechins like gallocatechin have higher small intestinal absorption than gallated catechins (ECG, EGCG), but gallocatechin's large pyrogallol ring still limits absorption to ~10–20% in the upper GI tract. The majority reaches the colon, where bacteria ring-cleave the catechin to produce gallic acid (from the pyrogallol B-ring degradation), dihydroxyphenylpropionic acid, and phenylacetic acids — all of which are well-absorbed and contribute to measurable plasma antioxidant activity after tea consumption.

Why is gallocatechin not individually standardised in commercial green tea extracts?
Commercial green tea extract standardisation focuses on EGCG as the primary catechin with the most robust evidence base and highest concentration. Gallocatechin's lower abundance, similar mechanism to EGCG, and absence of uniquely distinguishing clinical evidence have not created commercial demand for GC-specific standardisation. Full catechin profile reporting (HPLC with individual catechin quantification) is the most rigorous quality approach for formulations where the complete catechin spectrum is clinically intended.

Related compounds: EGCG, Epicatechin Gallate, Gallocatechin Gallate, Catechin

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Claim-strength scale – High = multiple human RCTs; Moderate = limited trials or strong preclinical convergence; Emerging = early-stage lab or animal data.

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