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Natural Factors
ResveratrolRich®, Resveratrol Concentrate, Super Strength, 60 Vegetarian Capsules
1 Capsule
What it does
Resveratrol
Mixed formsGrade —
Label lists ResveratrolRich® Proprietary Blend[Wine Grape concentrate and Resveratrol from Japanese Knotweed] (500 mg). Benefit information is limited.
Ingredients (2)
Other ingredients
Rice FlourFiller
Rice-based ingredients carry risk of inorganic arsenic contamination (FDA and Consumer Reports). Rice accumulates arsenic from soil at higher rates than other grains. Used as a cheap filler — adds nothing beneficial.
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
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.
Lab testing
How to take it
With a meal containing fat
On the label
1 capsule per day or as directed by a health professional.
Price check
$27.97
Near the median of 58 resveratrol supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the 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. studied 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.
Not medical advice. Consult your healthcare professional.