...when I was studying A&P in college (one of my fav subjects), and we were learning about energy combustion in the muscles (I hope I get this right, its been sooooo many years), I believe ascorbic acid was a necessary ingredient in the process required to produce ATP, which I think, has something to do with the muscles being able to work properly and energy levels. Is this right? I have often wondered if that is why Vit. C always boosts my energy level. I use to see a doc in Houston who was trying to treat the fibro and chronic fatigue. She would test the urine for ATP levels. Mine were very low and below normal. The killer cells would always be very low as well. I use to give myself injections, and now I forget what it was, that were suppose to help boost the level of ATP and the killer cells. Unfortunately, it never worked. But I am thinking that if I can take the vit. C it woud produce this result naturally?