BioStacks
Best for
Ingredients (12)
Vitamin K2
100%Dose
180 mcg
Target
90–200 mcg
Form
Premium
Vitamin D
100%Dose
1000 IU
Target
1000–5000 IU
Form
Premium
Vitamin C
72%Dose
18 mg
Target
25–200 mg
Form
Budget
Vitamin E
10%Dose
5 mg
Target
50–268 mg
Form
Premium
Magnesium Citrate
50%Dose
50 mg
Target
100–400 mg
Form
Standard
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
How to Take It
Best taken in the evening
The Magnesium in it is what pulls this toward the evening. Take it with a meal containing fat — the vitamins D, E and K in it absorb poorly without one.
With a meal containing fat
Space it a couple of hours from Iron and Calcium
On the label
Take at least 2 capsules daily with food and water.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$19.00
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.