I have a full tub of Universals Animal Pak. I have only taken it a few times, but I believe that it made me burp alot and have a bad taste in my throat. I was wondering which pills in the Pak cause this. I really don't need all the vitimins and such that are in there because i take a Centrum. All I really want are the amino acids. Does anyone know which pill/s that would contain that?