BioStacks
Best for
Ingredients (2)
Vitamin D
100%Dose
6320 IU
Target
1000–5000 IU
Form
Premium
Magnesium
100%Dose
100 mg
Target
100–400 mg
Form
Standard
Other Ingredients (5)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Dicalcium PhosphateBinder
Calcium and phosphorus compound used as binder
GlycerinHumectant
Sweet-tasting liquid used in soft capsules and liquids
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
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 vitamin D in it absorbs poorly without one.
With a meal containing fat
Space it a couple of hours from Iron and Calcium
On the label
FOR ADULTS TAKE ONE (1) TABLET DAILY, PREFERABLY WITH A MEAL.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$14.77
Near the median of 552 vitamin D 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.