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Pantothenic acid or vitamin B5 is a water-soluble vitamin is needed to make the body's chemical called acetylcholine, which is essential for conducting nerve signals from spinal cord to the muscles. Low levels of vitamin B5 indeed cause muscle sourness but the deficiency is very rare since this vitamin is found in just about every food. The recommended daily doze is 10 mg. High doses of vitamin B5 are not completely safe: there are clinical evidence that 300 mg daily for several weeks cause serious illness in the elderly.
|Jennifer Mathes, Ph.D.|