BioStacks
Best for
Ingredients (8)
Zinc
100%Dose
15 mg
Target
15–30 mg
Form
Standard
Vitamin D
44%Dose
440 IU
Target
1000–5000 IU
Form
Premium
Calcium
100%Dose
450 mg
Target
200–600 mg
Form
Not listed
Magnesium
100%Dose
225 mg
Target
100–400 mg
Form
Not listed
Coral Calcium
100%Dose
1145 mg
Target
200–600 mg
Form
Budget
Other Ingredients (3)
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
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 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
On the label
Take two vegetarian capsules daily with food.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$29.99
Pricier than 78% of 294 calcium 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.