I began with ALA (ordinary) and noticed a difference in my feet almost immediately. I then changed to R-ALA. However, I have been having some issues with my post meal BS rises being a bit higher than I would expect considering the food eaten. No differences in my base levels. Looking back at my records this started when I started the R-ALA. It may be a coincidence, and there maybe another reason for this, but yesterday I decided to stop taking the R-ALA for a period to see if it makes a difference.
I would be interested to hear if anyone else has noticed this.