BioStacks
Best for
Ingredients (2)
Vitamin D
100%Dose
2520 IU
Target
1000–5000 IU
Form
Premium
Vitamin K
100%Dose
90 mcg
Target
90–200 mcg
Form
Premium
Other Ingredients (5)
Denatured AlcoholSolvent
At higher topical levels it can dry and irritate skin and disrupt the skin barrier with repeated use.
Natural FlavorsFlavor
Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.
GlycerinHumectant
Sweet-tasting liquid used in soft capsules and liquids
Mixed TocopherolsAntioxidant
Natural vitamin E used as preservative
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
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
On the label
Take 1 pump by mouth 1-2 times daily. Hold in mouth 30 seconds before swallowing. May be mixed into water. Repeat to desired dosage or as directed by a healthcare professional. Take on an empty stomach, at least 10 minutes before meals. Use within 6 months of opening. If pregnant, consult physician before use.
The label says to take it on an empty stomach, but what's in this absorbs poorly without dietary fat. Take it with a meal that has some.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$49.75
Pricier than 91% of 165 vitamin K 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.