Art/Vancouver/R-lipoic acid: I tried Art's protocol for neuropathy. He recommended 500 mgs 3/day...I got up to 700 mgs once a day and woke up with calf cramps on both legs front and back. From 4:00AM to 6:00AM screaming calf cramps. Maybe I'm using the wrong brand (natrol)? They do seem to differ a bit.