BioStacks
Best for
Ingredients (5)
Vitamin D
60%Dose
600 IU
Target
1000–5000 IU
Form
Premium
Magnesium
84%Dose
84 mg
Target
100–400 mg
Form
Standard
Calcium
100%Dose
591 mg
Target
200–600 mg
Form
Not listed
Coral Calcium
100%Dose
1500 mg
Target
200–600 mg
Form
Budget
Vitamin C
3%Dose
7.5 mg
Target
250–2000 mg
Form
Budget
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.
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
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
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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.