Alpha Lipoic Acid: What You Need to Know -for PD
 

*Free radicals. It sounds like something they give away at protest rallies. But in your body, they are cells with unpaired electrons that attack other molecules to achieve stability, damaging the DNA of those molecules and spreading disease.

Enter the antioxidant -- compounds the body uses as its defense system to fight free radicals and keep them from setting off chain reactions of cell mutation that can lead to a host of chronic diseases like cancer, heart disease, Alzheimer's and Parkinson's [source: Davis].
http://tlc.howstuffworks.com/family/...ipoic-acid.htm

ALA the Berkley letteer

http://www.wellnessletter.com/ucberk...a-lipoic-acid/

There is a newer improved version of lipoic acid available now.

R-lipoic acid stabilized. NaRALA. Most of us on PN use this version now --only needs 100mg a day for most people.
Doctor's Best is a good affordable brand. Available now on Amazon, too. Best taken on an empty stomach. The old ALA too has reduced absorption with food present.

If you search lipoic acid on PN forum, there are many threads when we discuss this.