Punica granatum L. · herb
Evidence tier: limited
A polyphenol rich extract with strong evidence for cardiovascular and prostate health.
Pomegranate is rich in punicalagins, large polyphenols the body cannot absorb intact. Gut bacteria break them down into smaller molecules called urolithins, and it is the urolithins, not the punicalagins, that circulate. The leading explanation for the blood pressure signal is that these metabolites improve the function of the endothelium, the lining of the blood vessels, letting vessels relax. Two honest caveats. Whether you make urolithins at all depends on your gut microbiome and a substantial fraction of people are poor producers, which may be why trial results are so variable. And the broader antioxidant mechanism the ingredient is sold on is not supported by outcome data: a meta analysis found no reduction in oxidative stress.
Limited. Blood pressure is the only claim with anything behind it, and the effect is modest. Meta analyses of pomegranate juice trials do consistently point the same way: one pooling 8 RCTs found systolic pressure down about 5 mmHg and diastolic down about 2 mmHg; a larger and more recent pooling of 33 studies found systolic down about 3.5 mmHg and diastolic about 1.5 mmHg. Consistent direction, small magnitude, and the trials are short, small and heterogeneous in what they gave people (juice, extract, different polyphenol loads). MSK's read on the same literature is blunt: a meta analysis found the evidence WEAK for blood pressure management. Beyond that, the file thins fast. PROSTATE is the claim to kill first: MSK states the data are CONFLICTING on whether pomegranate juice slows the rate of PSA rise, and that a trial in advanced prostate cancer produced NO significant PSA reduction versus placebo. ERECTILE FUNCTION rests on one small randomised trial and is preliminary. And MSK lists outright negatives: no benefit for COPD, no reduction in oxidative stress in a meta analysis (which undercuts the whole antioxidant sales pitch), and no effect on menopausal hot flushes. Note also that blood pressure is a disease endpoint, so even the best of this evidence sits outside what a consumer supplement may claim.
The sources do not establish a defensible standard dose. The blood pressure meta analyses pooled trials of pomegranate JUICE at varying volumes and durations, not a standardised extract, and effects were most visible in trials of 2 months or less. Extract doses quoted in the supplement trade (for example 500 to 1000 mg standardised to punicalagins) are product conventions, not doses shown effective in the pooled trials.
500 to 1000 mg daily standardised to 30%+ punicalagins.
Generally very safe. Mild CYP3A4 inhibition, discuss with pharmacist if on prescriptions.
Pregnancy: caution
Breastfeeding: caution
Active compounds: punicalagins, ellagic acid, urolithins (gut microbiota derived metabolites)
Remedies using Pomegranate Extract · Browse by body system · Check it against what you take
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.