BioStacks
Best for
Ingredients (4)
Magnesium
100%Dose
800 mg
Target
100–400 mg
Form
Premium
Calcium
100%Dose
400 mg
Target
200–600 mg
Form
Premium
Vitamin D3
100%Dose
1000 IU
Target
1000–5000 IU
Form
Premium
Zinc
100%Dose
15 mg
Target
15–30 mg
Form
Standard
Other Ingredients (9)
MaltodextrinBinder
Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.
Medium Chain Triglyceride OilCarrier
Fractionated oils rich in C8/C10 triglycerides used as neutral carrier or anti-sticking agent
PolydextroseFiller
A synthetic soluble fiber/bulking agent made from glucose
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Calcium CarbonateBuffer
Common calcium salt used as a buffering agent, filler, or mineral fortification in supplements
Croscarmellose SodiumDisintegrant
Cross-linked cellulose derivative used as a superdisintegrant
HypromelloseCapsule
Plant-derived capsule material from cellulose
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
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 3 capsules daily.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$19.99
Near the median 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.