BioStacks
Best for
Ingredients (5)
Vitamin C
100%Dose
619 mg
Target
50–250 mg
Form
Standard
Rutin
40%Dose
100 mg
Target
250–500 mg
Form
—
Quercetin
10%Dose
50 mg
Target
500–1000 mg
Form
—
Calcium
68 mgTrace amount — not scored
Threonic acid
7 mgUnit not recognized — not scored
Other Ingredients (2)
Ascorbyl PalmitateAntioxidant
Fat-soluble form of vitamin C used as preservative
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
What's in this absorbs poorly without a fat-containing meal — take it with one.
With a meal containing fat
On the label
As a dietary supplement, take 1 capsule, 1-2 times daily, with or between meals.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$26.40
Near the median of 68 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. 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.