Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Magnesium citrate is commonly used as a supplement to support muscle function, including muscle tone, due to magnesium’s well-established role in neuromuscular physiology. Magnesium is an essential mineral involved in over 300 enzymatic reactions in the body, with a key role in nerve transmission, muscle contraction, and relaxation. Deficiency in magnesium can lead to symptoms such as muscle weakness, cramps, and even tetany, highlighting its importance in maintaining normal muscle tone. Several clinical studies and reviews (e.g., Gröber U et al., Nutrients, 2015) confirm that correcting magnesium deficiency can improve muscle symptoms, although evidence for benefit in those without deficiency is less robust.

Magnesium citrate is a widely used form of magnesium due to its high bioavailability. While it is primarily marketed and prescribed for constipation, its efficacy in restoring magnesium levels makes it a reasonable choice for individuals with low magnesium who are experiencing poor muscle tone or muscle cramps. There is moderate scientific support for the use of magnesium supplementation in those with demonstrable deficiency, but less evidence supports its use as a general tonic for muscle tone in otherwise healthy individuals. Overall, the use of magnesium citrate for supporting muscle tone is justified when there is a clear deficiency, but routine use in all cases of poor muscle tone lacks strong scientific backing.

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