Vitamin K2 Didn't Help Muscle Recovery in This 12-Week Trial

Moderate Evidence·Randomized Controlled Trial·Medicine and science in sports and exercise·Mar 2026

After 12 weeks of daily vitamin K2 supplements, neither young nor older adults saw improvements in muscle strength, soreness, or physical function after a tough leg workout. Some secondary measures in older adults showed small shifts in muscle activation speed and a damage marker at 72 hours. But the main outcomes were all null. The researchers say the age-specific signals need more study before drawing conclusions.

Key Insight

This study suggests vitamin K2 at this dose does not meaningfully improve post-exercise muscle recovery.

Original Paper

Medicine and science in sports and exercise··71 healthy adults (35 young, 36 older)

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