Silicon-deficient diets resulted in retarded growth, poor bone development, and more atherosclerotic arterial plaques in animal studies. Silicon has a similar healing potential on cartilage and joint degeneration as Sulfur, so both can be helpful for various types of arthritis... 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...