BioStacks
Best for
Ingredients (7)
Vitamin D3
100%Dose
1000 IU
Target
1000–5000 IU
Form
Premium
Vitamin C
100%Dose
500 mg
Target
250–2000 mg
Form
Budget
Citrus Bioflavonoids Complex
68%Dose
170 mg
Target
250–1000 mg
Form
—
Total Bioflavonoids
34%Dose
85 mg
Target
250–1000 mg
Form
—
Rutin
4%Dose
10 mg
Target
250–500 mg
Form
—
Other Ingredients (3)
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
GelatinCapsule
Protein derived from collagen, used in traditional capsule shells
How to Take It
Take it anytime
Fat-soluble — take with your largest fat-containing meal. Time of day doesn't matter.
With a meal containing fat
On the label
Take 1 capsule daily.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$29.95
Pricier than 73% of 502 vitamin C 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.