BioStacks
Best for
Ingredients (3)
Grape seed extract
100%Dose
200 mg
Target
150–600 mg
Form
—
L-Citrulline
100%Dose
3000 mg
Target
3000–6000 mg
Form
—
Quercetin Dihydrate
40%Dose
200 mg
Target
500–1000 mg
Form
—
Other Ingredients (3)
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
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
4 capsules per day or as recommended by your health care professional.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$65.10
Pricier than 95% of 71 quercetin 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. 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.