Just looking at the back of a BSN Volumaize sample pack, brings attention to A. Phenylketonurics: contains phenylalanine B. Hyper Beta-Alaninemia: Contains Beta-Alanine. so I look up Hyper Beta Alaninemia in a google search which brings me here. http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=237400 "...Beta-alanine is a central nervous system depressant..." Well, those who take pre-workout stim drinks like Jacked, N.O Xplode, or Superpump250 for instance. they have caffeine a Central Nervous Stimulant and beta alanine, which is claimed as a beta alanine depressant. what effects would having two contradicting substances have on the body?