BioStacks
Best for
Ingredients (6)
Vitamin D3
100%Dose
2520 IU
Target
1000–5000 IU
Form
Premium
Zinc
100%Dose
20 mg
Target
15–30 mg
Form
Premium
N-Acetyl-L-Cysteine
100%Dose
600 mg
Target
600–1800 mg
Form
—
Vitamin A
100%Dose
1500 mcg RAE
Target
700–1500 mcg
Form
Standard
Vitamin C
100%Dose
300 mg
Target
50–250 mg
Form
Budget
Other Ingredients (3)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
HypromelloseCapsule
Plant-derived capsule material from cellulose
Ascorbyl PalmitateAntioxidant
Fat-soluble form of vitamin C used as preservative
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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.