BioStacks
Best for
Ingredients (9)
Vitamin D3
100%Dose
8000 IU
Target
1000–5000 IU
Form
Premium
Vitamin K2
100%Dose
200 mcg
Target
90–200 mcg
Form
Premium
Calcium
100%Dose
800 mg
Target
200–600 mg
Form
Premium
Boron
100%Dose
6 mg
Target
3–6 mg
Form
Premium
Magnesium
100%Dose
400 mg
Target
100–400 mg
Form
Standard
Other Ingredients (6)
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.
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
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
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
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 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
On the label
Take ten (10) capsules daily, or as recommended by a healthcare practitioner. Scientific studies suggest calcium supplementation in divided doses with food in the morning and evening may yield the best results.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$42.00
Pricier than 95% of 632 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.