When iron levels test below normal, then manganese supplementation is frequently indicated as well, being the associated mineral of iron, which may help with low estrogenic-types of PMS, or hypoglycemic low blood sugar-types of symptoms. This tends to develop when high potassium intake - being more prevalent with vegetarianism - gradually depletes manganese levels in the body... 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...