Vitamin K2 Supplementation as a Potential Treatment for Nocturnal Leg Cramps
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Reviewed by Dat Tien Nguyen, B.A, ScM.
Translated by Nhi Phuong Quynh Le, B.A |
Posted on November 13th, 2024
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Nocturnal leg cramps are common among adults and can sometimes lead to insomnia and distress in rare severe cases. Currently, there are no safe and effective treatments: magnesium and calcium channel blockers have shown limited efficacy, and quinine poses toxicity risks. Previous research found that vitamin K2 supplementation reduced the frequency, severity, and duration of muscle cramps in dialysis patients. Based on these findings, a study was conducted to explore the potential of vitamin K2 supplementation for managing nocturnal leg cramps.
The clinical trial was conducted in China, and it involved 199 participants who experienced nocturnal leg cramps at least twice a week. Physical exams were conducted to exclude individuals whose leg cramps could be attributed to conditions such as hypothyroidism, alcoholism, or Parkinson’s disease. Participants were randomly assigned to receive either a placebo or 180 micrograms of vitamin K2 daily. After 8 weeks of treatment, researchers observed a significant reduction in the frequency of nocturnal leg cramps among the vitamin K2 group, with participants in the vitamin K2 group reporting fewer than one episode per week on average, compared to over three weekly episodes in the placebo group. Vitamin K2 also notably reduced the duration and severity of each episode. This effect is likely due to vitamin K2’s ability to promote muscle relaxation by inhibiting calcium influx into muscle cells. The authors concluded that vitamin K2, with few adverse effects, may be a safe and effective supplement for managing nocturnal leg cramps, though caution is advised when prescribing it to patients taking anticoagulants like warfarin.
The clinical trial was conducted in China, and it involved 199 participants who experienced nocturnal leg cramps at least twice a week. Physical exams were conducted to exclude individuals whose leg cramps could be attributed to conditions such as hypothyroidism, alcoholism, or Parkinson’s disease. Participants were randomly assigned to receive either a placebo or 180 micrograms of vitamin K2 daily. After 8 weeks of treatment, researchers observed a significant reduction in the frequency of nocturnal leg cramps among the vitamin K2 group, with participants in the vitamin K2 group reporting fewer than one episode per week on average, compared to over three weekly episodes in the placebo group. Vitamin K2 also notably reduced the duration and severity of each episode. This effect is likely due to vitamin K2’s ability to promote muscle relaxation by inhibiting calcium influx into muscle cells. The authors concluded that vitamin K2, with few adverse effects, may be a safe and effective supplement for managing nocturnal leg cramps, though caution is advised when prescribing it to patients taking anticoagulants like warfarin.