BioStacks
Best for
Ingredients (6)
Vitamin K2
100%Dose
100 mcg
Target
90–200 mcg
Form
Premium
Silicon
100%Dose
30 mg
Target
5–30 mg
Form
—
Boron
83%Dose
2.5 mg
Target
3–6 mg
Form
Standard
Vitamin C
24%Dose
60 mg
Target
250–2000 mg
Form
Budget
Inositol
25%Dose
500 mg
Target
2000–4000 mg
Form
—
Other Ingredients (4)
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
Gum AcaciaBinder
Natural plant gum (acacia) used as a binder, stabilizer, and emulsifier in foods and supplements
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Price Check
$38.69
Pricier than 84% 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.