(further evidence for use of folic acid--CS mentioned in an earlier post that he uses folic acid supplementation. husband uses 800 mcg/day...)
New Role for Folic Acid in Parkinson's
New research indicates the vitamin folic acid may protect against Parkinson's disease.

Experiments conducted with mice—who closely resemble humans genetically—offer "the first direct evidence that folic acid may have a key role in protecting adult nerve cells against age-related disease," says Mark Mattson, chief of the neurosciences laboratory of the National Institute on Aging. The study findings were reported in the January Journal of Neurochemistry.

Mice deprived of folic acid had fewer dopamine-producing cells, and more damaged cells, than mice given folic acid. Low levels of dopamine, a chemical in the brain that affects movement, are symptomatic of Parkinson's.

The National Academy of Sciences recommends 400 micrograms daily of folic acid, which is found in many B-complex vitamins.