BioStacks
Best for
Ingredients (4)
Vitamin D
100%Dose
2520 IU
Target
1000–5000 IU
Form
Premium
Vitamin K2
100%Dose
125 mcg
Target
90–200 mcg
Form
Standard
Vitamin K1 Phytonadione
100%Dose
200 mcg
Target
90–200 mcg
Form
Budget
Vitamin K
100%Dose
325 mcg
Target
90–200 mcg
Form
Not listed
Other Ingredients (6)
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
PhospholipidsCarrier
Naturally occurring phospholipids (primarily phosphatidylcholine) used to form liposomal encapsulation for nutrient delivery
Stevia ExtractSweetener
Zero-calorie natural sweetener extracted from the leaves of Stevia rebaudiana
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
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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.