BioStacks
Best for
Ingredients (7)
Quercetin Anhydrous
100%Dose
842 mg
Target
500–1000 mg
Form
—
Quercetin
100%Dose
800 mg
Target
500–1000 mg
Form
—
BioPerine
100%Dose
5 mg
Target
5–20 mg
Form
—
Vitamin C
100%Dose
250 mg
Target
50–250 mg
Form
Budget
Citrus Bioflavonoids
40%Dose
100 mg
Target
250–1000 mg
Form
—
Other Ingredients (2)
HypromelloseCapsule
Plant-derived capsule material from cellulose
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
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
Take 3 capsules daily between meals.
The label says to take it on an empty stomach, but what's in this absorbs poorly without dietary fat. Take it with a meal that has some.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$29.99
Pricier than 81% of 38 citrus bioflavonoids 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.