BioStacks
Best for
Ingredients (4)
Vitamin K
89%Dose
80 mcg
Target
90–200 mcg
Form
Premium
Calcium
100%Dose
1300 mg
Target
200–600 mg
Form
Not listed
Vitamin D-3
100%Dose
1000 IU
Target
1000–5000 IU
Form
Not listed
Magnesium
100%Dose
100 mg
Target
100–400 mg
Form
Not listed
Other Ingredients (5)
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
SpinachFood
Dried spinach (Spinacia oleracea) leaf powder, a whole-food green.
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Croscarmellose SodiumDisintegrant
Cross-linked cellulose derivative used as a superdisintegrant
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 and Zinc
On the label
Use only as directed. Take three (3) tablets with a meal or glass of water.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$29.19
Pricier than 83% of 586 vitamin D supplements
Track this supplement in your stack
Get personalized insights, interactions, and coverage recommendations.
Get Started FreeSimilar Supplements
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.