I took a chance on this Alpha Lipoic Acid 600mg (2 capsules a day) after reading reviews. I was in physical therapy for 2 months and then went to a chiropractor for 2 more months. My back issue is resolved, but I kept getting burning and tingling around various areas of my left foot for 6 months. I don’t know what caused it, but it was getting difficult to walk at times. My foot would “go to sleep” more often than not. I do not have diabetes. THE VERY DAY I started taking this Alpha Lipoic Acid 600mg (2 capsules a day) my burning and tingling was GONE! WOWEEEEEEEE! It’s like a miracle! Everyone was stumped as to my neuropathy(?) cause but whatever it was, it’s gone now! I’ve been taking this for 20 days now and had ZERO days with tingling. It lasts about 12 hours and I could start to feel just a little tingling at bedtime for the first week, and I don’t even get that anymore.