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Question: Can coconut water help with muscle cramps or restless legs syndrome?
Answer: As discussed in the Coconut Waters Review, coconut water can be a rich source of potassium, a mineral which is essential for proper muscle and nerve function. Potassium deficiency can cause muscle spasms, which may be one reason it's sometimes promoted for muscle cramps.
One preliminary study suggests that potassium may be helpful for restless legs syndrome, however, there are no clinical studies on the use of coconut water for muscle cramps or restless legs syndrome. Be aware getting too much potassium may also cause leg cramps — and there have been reports of elevated blood levels of potassium and related serious adverse effects in people who consumed excessive amounts of coconut water. For more information, see the "Concerns and Cautions" sections of the Potassium Supplements Review and the Coconut Waters Review.