R-Lipoic Acid is the form of alpha-lipoic acid your body actually produces and uses. Standard ALA supplements mix two forms 50/50, but the R form absorbs better and enters cells more easily.
People take it to support mitochondria, the energy factories inside cells, and to help neutralize oxidative stress. It also promotes healthy blood sugar metabolism and nerve function.
Take it on an empty stomach or at least 30 minutes before food. Some split their dose between morning and afternoon to keep levels steady. Sensitive individuals sometimes notice mild stomach upset or skin reactions.