Vitamin K2 (MK-7) Improves Bone Strength and Quality—Not Just Density

Dr. Kumar’s Take:

This study highlights a major gap in how we think about bone health. While most guidelines focus on bone density, this review emphasizes bone quality—collagen strength, protein activation, and flexibility. MK-7 (vitamin K2) outperforms K1 and MK-4 in activating osteocalcin and supporting healthy bone architecture, especially at nutritional doses. If you’re over 40 or at risk for fractures, MK-7 could be a smart addition to your daily routine.

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3-Year Study Finds Vitamin K2 (MK-7) Helps Prevent Bone Loss in Postmenopausal Women

Dr. Kumar’s Take:

This 3-year randomized study adds strong evidence that daily low-dose Vitamin K2 (MK-7) can help reduce bone loss in postmenopausal women. The supplement improved markers of vitamin K status, preserved bone mineral density in the spine, and improved femoral bone strength compared to placebo. These benefits took time—only emerging after 2–3 years—so consistency and patience are key.

If you’re postmenopausal and looking for non-drug ways to support bone health, this is a compelling case for adding MK-7 to your routine.

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Why MK-7 May Be the Better Vitamin K2 for Bone and Heart Health

Dr. Kumar’s Take:

This study helps clear up an important question about vitamin K2 supplements: which form actually gets into your bloodstream? The researchers found that menaquinone-7 (MK-7) is well absorbed, stays in the blood for longer, and builds up with daily use. In contrast, MK-4 did not show up in the blood at all at nutritional doses.

If you’re choosing a K2 supplement to support your heart or bones, this study suggests MK-7 is the better choice for bioavailability.

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