If muscle cramping gets worse when supplementing extra calcium, then high calcium levels may be suspect and extra co-factors may be required to make calcium more bioavailable. Remedies to choose from include a higher daily intake of Vitamin C, Lecithin, Omega 3, Protein, Magnesium, and others. Increasing stomach acid with supplements, or using lemon water with meals are other options... Full Text
Dr. Ronald Roth's Research Library on Cellular Nutrition and Health Disorders
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...