MSM also reduces lactic acid and related muscle soreness. That mechanism can benefit cancer patients when large amounts of MSM are taken, as it interferes with the increased glucose synthesis from lactic acid. This Cori cycle loop, where lactic acid is released by the tumor, converted in the liver to glucose, and then taken up again by cancer cells, is one reason many cancer patients experience cachexia, a common wasting syndrome with cancer that causes weight loss, anorexia, fatigue, weakness, shortness of breath, and muscle atrophy... Full Text

Manganese may help with some symptoms of Parkinson's disease such as muscle rigidity and twitching...
Research shows that phytosterols such as beta-sitosterol may help normalize the function of natural killer cells and T-helper lymphocytes...
Iron deficiency may be suspect with some forms of ADHD. 84% of children with ADHD were found to have abnormally low levels of ferritin...
A high intake of B Vitamins can trigger heart palpitations, HBP, major complications in patients with congestive heart disease...