Yes and homocysteine levels. I did one set of blood tests and will do another in a few weeks. The thing with Metanx is it can take from one week to 4 months to know if it is helping. I figure it was at least worth a try. Also it is the active forms of Vitamin B12, Vitamin B6 and Folic Acid. Right now I am getting less numbness and tingling so that is a good sign. I have also noticed that the neuropathy symptoms seem to increase if I eat anything with HFCS, Corn Syrup, Corn Syrup Solids or Maltodextrin so also am trying my best to avoid those ingredients as well. I can't say Metanx will work for everyone. It may work and again it may not. The one thing is one has to give it a chance and should be on it for at least 4 months before giving up. I did get a drug discount card for it and that has helped save money. I figured it was at least worth a try.What are you taking this for, neuropathy?