BioStacks
Best for
Ingredients (1)
Vitamin K2
100%Dose
45000 mcg
Target
90–200 mcg
Form
Standard
Other Ingredients (2)
Rice FlourFiller
Rice-based ingredients carry risk of inorganic arsenic contamination (FDA and Consumer Reports). Rice accumulates arsenic from soil at higher rates than other grains. Used as a cheap filler — adds nothing beneficial.
Capsule ShellCapsule
Generic capsule shell where the label does not specify the material. Common materials are hypromellose (HPMC) for vegetarian capsules and gelatin for traditional capsules — both are GRAS-listed and safe. Fish gelatin and pullulan variants also exist.
How to Take It
Take it anytime
Fat-soluble — take with a meal containing fat for better absorption. Time of day doesn't matter.
With a meal containing fat
On the label
Take 1 capsule 1-3 times daily with food, or as directed by a qualified health care practitioner.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$43.97
Pricier than 90% of 144 vitamin K supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the 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. studied 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.