Calcium and Vitamin D
for Muscle Cramps
Calcium is directly involved in the muscle contraction mechanism; deficiency can cause muscle cramps. Vitamin D is required for calcium absorption and neuromuscular function.
How it works
Calcium triggers muscle contraction at the troponin-tropomyosin complex. Hypocalcaemia causes increased membrane excitability and spontaneous cramping (tetany in severe cases). Vitamin D deficiency reduces calcium absorption and impairs neuromuscular function.
What to watch for
Most relevant when deficiency is present — assess with serum calcium and 25-OH vitamin D before high-dose supplementation. Calcium supplementation without vitamin D is poorly absorbed. Avoid excessive supplementation.
Community experience
Other remedies for Muscle Cramps
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