I have tried Alpha Lipoic acid supplements several times for UNKNOWN- Neuropathy. ( I have NO signs of pre- or current Diabetes in my blood tests.) No matter were I buy my ALA, or what type of ALA I buy, after I take it for a short time, I start to have a loss of my vision. Even the Huge two foot tall speed signs next to the highway that read, " Speed Limit 50 (MPH) ". become very blurry. If I stop taking the ALA this allergy goes away. If I manage to take ALA long enough my Unknown Neuropathy gets much better. I have tried supplements of both regular ALA from a Health Food Store, and the newer R+ types. I have even invested in Geronva Researches NEW R-Lipoic Acid with R-Dihydrolipoic Bio enhansed acid, to the tune of over $700.00 for a years supply. All of these types of ALA soon give me blurry vision. If I stop taking the ALA, my clear vision returns in slightly over two days. In the meanwile my Neuropathy gets ever worse with out ALA. Have you any suggestions for me?