Pure Encapsulations R-Lipoic Acid 120cPure Encapsulations R Lipoic Acid offers support for nerves, blood, energy and the metabolism. Facilitating proper metabolic processes is essential when it comes to generating energy for your body. Without a well functioning metabolism the food we eat would not be converted into the energy we use every day. R Lipoic Acid capsules from Douglas Labs may be able to help with these processes and more.