They are usually used for people with decreased enzyme levels. If you have no preexisting condition i.e. pancreatic problems then you should already be producing sufficient enzymes to digest the protein you consume. I am not an expert, but I would venture that adding additional enzymes might increase the rate at which the proteins are broken down into tri & di peptides; they may also increase the amount of protein digested since the proteases will have access to the proteins for a longer period of time. So yes I think it possible that it may increase available amino acids and possibly an elevated BUN.