... up to 11 mg per day. More than 11 mg per day might not be safe. Excess manganese can cause serious side effects, including symptoms resembling Parkinson's disease, such as shaking (tremors). People who have trouble ...
www.nlm.nih.gov/medlineplus/druginfo/natural/182.html - Drugs and Supplements
... Practice parameter: neuroprotective strategies and alternative therapies for parkinsondisease (an evidence-based review): report of the Quality Standards Subcommittee of the American Academy of Neurology. Neurology . 2006 Apr 11;66(7): 976-82.
www.nlm.nih.gov/medlineplus/ency/article/002020.htm - Medical Encyclopedia