Okay I'm new to this and need some help. I have been lifting and dieting for about 4 years. A friend of mine who is a personal trainer gave me a few vials of HCG and I am not sure if they are 2000 or 5000IU vials. They are unmarked and have a blue top. Is there an easy way to see if they are 2000 or 5000IU? I want to make sure I mix them correctly. Any help would be appreciated!