Resveratrol 500mg by Vital Nutrients

Resveratrol appeals to people interested in cardiovascular and healthy-aging support who already have the basics in place: activity, diet, sleep, blood pressure and lipids. It is an optional extra, not a foundation, and no lab test tells you that you need it. It is a poor fit if you take a blood thinner or antiplatelet medicine, have a hormone-sensitive condition, or are pregnant or nursing, unless your clinician has agreed.

Each capsule contains 500 mg of Polygonum cuspidatum (Japanese knotweed) root extract, which supplies 250 mg of trans-resveratrol, the active form of the compound also found in grape skins. The 500 mg in the product name refers to the extract, not to the resveratrol. In laboratory studies resveratrol acts as an antioxidant and switches on cell-maintenance pathways such as sirtuins and AMPK, and it supports the relaxation of blood vessel walls. The body absorbs it well but breaks it down quickly, so blood levels stay low.

The directions are 1 capsule daily, or as your healthcare professional directs. You can take it with or without food; a meal helps if it bothers your stomach. Take it at the same time each day, and do not double up to reach a higher dose on your own, because side effects and drug interactions become more likely as the amount rises.

Resveratrol can reduce platelet clumping, so it may add to the effect of warfarin, clopidogrel, aspirin and other blood thinners; ask your prescriber first, and stop it at least 2 weeks before planned surgery. It can also slow the liver enzymes that clear some medicines, which may raise their levels, so check with your pharmacist if you take prescription drugs. It has weak estrogen-like activity, a reason for caution with hormone-sensitive conditions. Nausea and loose stools are the most common side effects. If you are pregnant or nursing, check with your clinician before use.

Keep expectations realistic. Most of the striking findings come from cell and animal work. Human trials are small and mixed, with modest effects on blood pressure and blood sugar in some groups and none in others, and no trial has shown that it extends human lifespan. If you try it, give it 2 to 3 months and stop if you and your clinician see no change. Purified trans-resveratrol products deliver the same compound without the other knotweed constituents; the practical differences are price and tolerance.