However, as demonstrated with several examples below, the effect of a regular, daily overdose of Vitamin C is not an acute event as experienced with a deadly, toxic substance, but a gradual change in mineral ratios, or the progressive lowering of other essential elements, which over time can result in the development of moderate to serious medical problems. An acute medical event can still arise though following a substantial Vitamin C overdose, where too much ascorbic acid lowers an already deficient nutrient even more, resulting in acute deficiency symptoms of that nutrient, or where an excessive intake of Vitamin C triggers acute gastrointestinal symptoms.... 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...