Dietary factors implicated with Alzheimer's disease include the presence of AGEs, as well as possible nutritional deficiencies that may include Vitamin A, C E, and omega 3 EFAs. One trial found a Vitamin B6, B12 & Folic acid combination to slow brain shrinkage, which is a major risk factor for Alzheimer's disease, while another study found that Alzheimer's patients did not benefit from those remedies... 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...