BioStacks
Best for
Ingredients (6)
Japanese Knotweed (Polygonum cuspidatum) (root/rhizome extract)
50%Dose
75 mg
Target
150–500 mg
Form
Standard
Guaranteed 47.5 mg [95%] Polyphenols
47%Dose
47 mg
Target
100–1000 mg
Form
—
Guaranteed 20 mg [20%] Polyphenols
20%Dose
20 mg
Target
100–1000 mg
Form
—
Red Wine extract
10%Dose
25 mg
Target
250–500 mg
Form
—
Grape
100 mgNot in our database
Other Ingredients (5)
MaltodextrinBinder
Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
HypromelloseCapsule
Plant-derived capsule material from cellulose
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
Use only as directed. Take 1 softgel daily with a meal or glass of water.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$20.99
Cheaper than 69% of 58 resveratrol 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.