Phosphorus and calcium metabolism is linked, and requires Vitamin D for adequate uptake. Blood levels of phosphorus are increased by parathyroid hormone, and decreased by the thyroid hormone calcitonin. The kidneys excrete phosphates if blood levels rise, and they excrete less when dietary phosphate intake is low... 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...