A detailed review of the literature suggests a number of marginal nutritional deficiencies
may have etiologic relevance. These include deficiencies of various B vitamins, vitamin C,
magnesium, sodium, zinc, L-tryptophan, L-carnitine, coenzyme Q10, and essential fatty
acids. Any of these nutrients could be marginally deficient in CFS patients, a finding that
appears to be primarily due to the illness process rather than to inadequate diets.