Goin back to this subject I found that "Nitric Oxide" aids in cellular signaling. You can get pills at health stores like GNC. Ill save all the mumbo jumbo and let you read some of the stuff I found. http://www.nature.com/ki/journal/v61/n3/abs/4492825a.html
I used to take a protein shake that had nitric oxide. It definitly dialates the veins thats for sure. I can't say that it made a difference, though I'm not too sure it was a while ago.