BioStacks
Best for
Ingredients (2)
Vitamin D3
100%Dose/day
1600 IU
Target
1000–5000 IU
Form
Premium
Calcium
100%Dose/day
1200 mg
Target
200–600 mg
Form
Budget
Other Ingredients (13)
Blue 2 LakeColorant
A synthetic coal-tar/petroleum-derived dye used purely for color, linked to behavioral concerns in sensitive children. The lake form adds aluminum. No health benefit — we flag all artificial colors.
TalcAnti-caking
IARC classifies cosmetic-grade talc not containing asbestos as Group 2B (possibly carcinogenic to humans); perineal talc use as Group 2A (probably carcinogenic). Johnson & Johnson voluntarily withdrew talc-based baby powder from US/Canada in 2020 and globally in 2022 after extensive litigation tied to ovarian-cancer and mesothelioma cases. The 2018 FDA contamination survey found asbestos in 9 of 52 cosmetic talc products tested. As a supplement excipient talc is a pure manufacturing convenience — no nutritional or functional benefit to the user — so the asbestos-exposure risk has no offsetting upside. Safer alternatives (silicon dioxide, microcrystalline cellulose, rice hulls) are widely available.
Titanium DioxideColorant
Banned in the EU (2022) over concerns that its ultra-fine particles may damage DNA in gut cells. Still allowed in the US. Used only for white coloring — provides no health benefit.
FD&C Yellow No. 6Colorant
May trigger sensitivity in some individuals; behavioral concerns in susceptible children
FD&C Red No. 40Color
Artificial azo dye; ADI-limited; associations with hyperactivity in sensitive children in some studies.
MonoglyceridesEmulsifier
Glycerol monoesters of fatty acids used as emulsifiers and processing lubricants
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
MonoglyceridesEmulsifier
Glycerol monoesters of fatty acids used as emulsifiers and processing lubricants
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, Magnesium and Zinc
Split into 2 doses across the day
On the label
As a calcium supplement, take one (1) tablet with any meal, twice daily or as directed by a healthcare provider. Do not exceed recommended dosage. Individual results may vary.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$4.99
Cheaper than 97% 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.