BioStacks
Best for
Ingredients (6)
Vitamin D3
60%Dose
600 IU
Target
1000–5000 IU
Form
Premium
Calcium
100%Dose
650 mg
Target
200–600 mg
Form
Budget
Strontium
100%Dose
500 mg
Target
340–680 mg
Form
Standard
Boron
67%Dose
2 mg
Target
3–6 mg
Form
Premium
Zinc
33%Dose
5 mg
Target
15–30 mg
Form
Premium
Other Ingredients (8)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
GlycerinHumectant
Sweet-tasting liquid used in soft capsules and liquids
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
StarchBinder
Carbohydrate polymer used as a binder, filler, and disintegrant in tablets and capsules
Croscarmellose SodiumDisintegrant
Cross-linked cellulose derivative used as a superdisintegrant
HypromelloseCapsule
Plant-derived capsule material from cellulose
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
How to Take It
Take it anytime
Fat-soluble — take with your largest fat-containing meal. Time of day doesn't matter.
With a meal containing fat
Keep it away from high-oxalate foods like spinach
Space it a couple of hours from Iron and Magnesium
On the label
As a dietary supplement, take 2 Tablets, or as directed by a qualified healthcare practitioner.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$29.00
Near the median of 638 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.