BioStacks
Best for
Ingredients (3)
Trans-Resveratrol
67%Dose
100 mg
Target
150–500 mg
Form
Premium
Grape (Vitis vinifera) extract
33%Dose
50 mg
Target
150–600 mg
Form
—
Red Wine Grape (Vitis vinifera) concentrate
20%Dose
50 mg
Target
250–500 mg
Form
—
Other Ingredients (3)
Ascorbyl PalmitateAntioxidant
Fat-soluble form of vitamin C used as preservative
Hypoallergenic Plant FiberFiller
Plant-derived cellulose fiber used as a hypoallergenic filler, common in Thorne and Pure Encapsulations products
Capsule ShellCapsule
Generic capsule shell where the label does not specify the material. Common materials are hypromellose (HPMC) for vegetarian capsules and gelatin for traditional capsules — both are GRAS-listed and safe. Fish gelatin and pullulan variants also exist.
How to Take It
Take it anytime
Poorly absorbed on its own — take with a fat-containing meal.
With a meal containing fat
On the label
As a dietary supplement, take 1 capsule daily, with or between meals, or as directed by a health professional.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$84.00
Pricier than 99% of 49 grape seed extract supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.