BioStacks
Best for
Ingredients (2)
Vitamin D3
100%Dose
2000 IU
Target
1000–5000 IU
Form
Premium
Vitamin C
100%Dose
250 mg
Target
250–2000 mg
Form
Budget
Other Ingredients (2)
LeucineFlow Aid
Branched-chain amino acid used as a processing aid
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
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
One (1) capsule daily with a meal, or as directed by a healthcare professional.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$23.50
Near the median 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.