BioStacks
21st Century

K2 MK-7 100 mcg

1 Capsule · 110 servings · $0.08/serving

iHerbAmazon

Best for

Bone & Joint

Ingredients (1)

Vitamin K2

100%

Dose

100 mcg

Target

90–200 mcg

Form

Premium

Other Ingredients (6)

TalcAnti-caking

IARC classifies cosmetic-grade talc not containing asbestos as Group 2B (possibly carcinogenic to humans); perineal talc use as Group 2A (probably carcinogenic). Johnson & Johnson voluntarily withdrew talc-based baby powder from US/Canada in 2020 and globally in 2022 after extensive litigation tied to ovarian-cancer and mesothelioma cases. The 2018 FDA contamination survey found asbestos in 9 of 52 cosmetic talc products tested. As a supplement excipient talc is a pure manufacturing convenience — no nutritional or functional benefit to the user — so the asbestos-exposure risk has no offsetting upside. Safer alternatives (silicon dioxide, microcrystalline cellulose, rice hulls) are widely available.

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

Dicalcium PhosphateBinder

Calcium and phosphorus compound used as binder

Oat FiberFiber

Insoluble dietary fiber from the outer hull or bran of oat grains; primarily cellulose and hemicellulose, low in beta-glucan compared to oat bran soluble fraction

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

As a vitamin supplement, adults take one (1) capsule daily with any meal or as directed by a healthcare provider. Do not exceed recommended dosage. Individual results may vary.

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$9.00

$10$20$50

Cheaper than 91% of 144 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.

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