BioStacks
Best for
Ingredients (5)
Calcium
100%Dose/day
500 mg
Target
200–600 mg
Form
Premium
Magnesium
100%Dose/day
200 mg
Target
100–400 mg
Form
Premium
Vitamin D3
40%Dose/day
400 IU
Target
1000–5000 IU
Form
Premium
Vitamin K
100%Dose/day
400 mcg
Target
90–200 mcg
Form
Not listed
Boron
33%Dose/day
1 mg
Target
3–6 mg
Form
Standard
Other Ingredients (3)
Ascorbyl PalmitateAntioxidant
Fat-soluble form of vitamin C used as preservative
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Capsule ShellCapsule
Generic capsule shell where the label does not specify the material. Common materials are hypromellose (HPMC) for vegetarian capsules and gelatin for traditional capsules — both are GRAS-listed and safe. Fish gelatin and pullulan variants also exist.
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 and K in it absorb 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
Label directs 2 servings — keep one for the evening
On the label
Take 2 capsules, 2 times daily with food or as directed by a healthcare professional.
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.