Herbs (Global Traditional) · Ayurveda
Phyllanthus emblica
Strong Evidencebotanical
Hermetica Superfood Encyclopedia
Phyllanthus emblica contains high concentrations of vitamin C and ellagitannins that provide potent antioxidant effects. The fruit works primarily through reducing oxidative stress and supporting endothelial function in blood vessels.
Phyllanthus emblica, commonly known as Amla or Indian gooseberry, is a deciduous tree native to the Indian subcontinent and distributed throughout tropical Asia. The fruit serves as the primary source, with extracts typically obtained through aqueous or ethanolic methods from fresh or dried fruit pericarp, yielding polyphenol-rich preparations high in tannins, flavonoids, and vitamin C.
Clinical evidence includes a randomized controlled trial (n=59) showing significant endothelial function improvement with 250-500mg twice daily for 12 weeks (PMID: 31060549). A COVID-19 adjunct therapy trial (n=61) demonstrated shorter hospital stays and improved clinical outcomes (PMID: 35093510). Additional RCT evidence exists for cardiovascular risk reduction in overweight adults using CAPROS standardized extract (PMID: 25756303).
Clinically studied dosages include 250mg twice daily (500mg/day) and 500mg twice daily (1000mg/day) of aqueous extract for 12 weeks, with both doses showing efficacy. CAPROS standardized extract has been used in cardiovascular studies, though specific dosage was not detailed. Consult a healthcare provider before starting any new supplement.
**Bioactive Compounds:** Exceptionally rich in vitamin C (approximately 600–1,800 mg per 100g fresh fruit, though values vary significantly by cultivar and processing; heat-stable due to complexation with tannins). Contains a diverse polyphenol profile including hydrolyzable tannins — notably emblicanin A (37% of tannin fraction), emblicanin B, punigluconin, and pedunculagin — as well as ellagic acid (approx. 1.6–2.4% dry weight), gallic acid (approx. 1.3–1.7% dry weight), and corilagin. **Flavonoids** include quercetin, kaempferol, and their glycosides. **Macronutrients (per 100g fresh fruit):** Carbohydrates ~10–14g (including dietary fiber ~3.4–4.3g, primarily pectin and hemicellulose), protein ~0.5–0.9g, fat ~0.1–0.5g. **Minerals:** Iron ~1.2–3.0 mg, calcium ~25–50 mg, phosphorus ~20–27 mg, chromium (trace, potentially relevant to glycemic effects), zinc ~0.12 mg, magnesium ~10–13 mg per 100g fresh fruit. **Vitamins:** Carotenoids (β-carotene ~9–13 µg/100g), riboflavin ~0.01 mg, thiamine ~0.03 mg, niacin ~0.2 mg per 100g. **Other bioactives:** Superoxide dismutase (SOD)-like activity compounds; mucic acid (1,4-lactone); phyllemblin (a unique diarylbutanoid); low molecular weight organic acids including citric, malic, and succinic acids. **Bioavailability notes:** The tannin-vitamin C complex confers notable thermal stability, preserving antioxidant activity through traditional Ayurvedic processing methods (e.g., churna, amalaki rasayana). Ellagitannins are metabolized by gut microbiota into urolithins (A and B), whose production varies by individual enterotype, significantly affecting systemic bioavailability. Gallic acid demonstrates relatively high oral bioavailability (~30–40% in animal models). Standardized commercial extracts are typically titrated to 35–60% total polyphenols or specific tannin content (emblicanin A+B), with clinical doses commonly ranging from 250–1,000 mg of extract daily (equivalent to approximately 5–20g of fresh fruit depending on extract ratio). The high ascorbic acid content may enhance non-heme iron absorption from co-consumed foods.
Phyllanthus emblica's bioactive compounds, particularly ellagitannins and ascorbic acid, scavenge free radicals and inhibit lipid peroxidation. The fruit's antioxidants enhance nitric oxide bioavailability in endothelial cells, improving vascular function. Additionally, its polyphenolic compounds modulate inflammatory pathways by inhibiting NF-κB activation.
A randomized controlled trial with 59 participants demonstrated significant improvement in endothelial function after 12 weeks of supplementation (P<0.001). Clinical studies have tested doses of 250mg and 500mg twice daily, both showing reductions in oxidative stress biomarkers. The evidence base consists primarily of small-scale human trials and preliminary studies. More large-scale, long-term trials are needed to establish definitive therapeutic effects.
Phyllanthus emblica is generally well-tolerated with minimal reported side effects in clinical studies. High doses may cause gastrointestinal upset due to its high vitamin C content. The supplement may enhance the effects of anticoagulant medications due to its cardiovascular benefits. Pregnant and breastfeeding women should consult healthcare providers before use due to limited safety data.
