I saw R-lipoic at my drugstore and i did buy methylb12 there already. he told me he would get whatever brand in that I wanted jsut let him know . I think I"ll go to Amazon but someone else has mentioned that Life Extensions is good plus the magazine has lots of good info in it . So I'm on my own little journey to find out what works for me and feel that for now I'm going to use supplements /vitamins as the pain meds just knock me for a loop and if I can exercise to help then the pain doesn't seem to bother me as bad. Now that i've been found to be pre-diabetic I can work on that is hopes it will change things. I"m right on the border number of pre and normal so there is hope to avoid going higher . Thanks for all the wonderful things.