At 180 mcg, this **Vitamin K2** sits near the top of the clinically studied range for directing calcium into your bones and teeth instead of your arteries — a strong dose for bone density and cardiovascular support. It uses the MK-7 form, which stays in your blood for roughly four days, so a single daily softgel keeps levels steady where the short-acting MK-4 form would need several doses.

The MK-7 here comes from chickpea suspended in MCT oil, which aids absorption since K2 is fat-soluble. It works hand-in-hand with vitamin D — D pulls more calcium into your body and K2 directs where that calcium goes — so you'll get the most out of it paired with a D3 supplement rather than taken alone.

One caution: if you take warfarin or another blood thinner, vitamin K directly counteracts the medication — talk to your doctor before adding it.

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Sports Research

Vitamin K2, 180 mcg, 60 Veggie Softgels

1 Softgel

iHerbAmazon

Best for

Bone & Joint

Ingredients (1)

Vitamin K2

100%

Dose

180 mcg

Target

90–200 mcg

Form

Premium

Other Ingredients (2)

Medium Chain Triglyceride OilCarrier

Fractionated oils rich in C8/C10 triglycerides used as neutral carrier or anti-sticking agent

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.

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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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