BioStacks
Best for
Ingredients (4)
Vitamin C
100%Dose
1000 mg
Target
250–2000 mg
Form
Budget
Elderberry extract
17%Dose
50 mg
Target
300–600 mg
Form
—
Citrus Bioflavonoids
20%Dose
50 mg
Target
250–1000 mg
Form
—
Rose Hips
2%Dose
50 mg
Target
2500–5000 mg
Form
—
Other Ingredients (2)
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.
HypromelloseCapsule
Plant-derived capsule material from cellulose
Price Check
$14.95
Cheaper than 70% 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.