BioStacks
Best for
Ingredients (7)
Calcium
100%Dose
500 mg
Target
200–600 mg
Form
Standard
Magnesium
100%Dose
250 mg
Target
100–400 mg
Form
Budget
Vitamin D3
52%Dose
520 IU
Target
1000–5000 IU
Form
Premium
Horsetail powder
100%Dose
20 mg
Target
15–100 mg
Form
—
Stinging Nettle powder
7%Dose
20 mg
Target
300–600 mg
Form
Budget
Other Ingredients (4)
Coating (unspecified)Coating
Generic tablet coating declaration where the label does not itemize the coating's components; modern aqueous film coatings are typically cellulose-based (HPMC) with a plasticizer
Croscarmellose SodiumDisintegrant
Cross-linked cellulose derivative used as a superdisintegrant
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
Keep it away from high-oxalate foods like spinach
Space it a couple of hours from Iron and Zinc
On the label
Take one tablet per day, with or between meals. May take 2 per day in divided doses for advanced usage.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$33.99
Pricier than 89% of 586 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.