I load my PWO peps (mod grh 1-29 & ghrp2) about 2 hours prior to use. I put the syringes in a cold pack and take them at the gym immediately after training. I'd like to combine them in one syringe. I am sure I read somewhere in all this huge mass of information that you can combine them in a single syringe. If true, how long can they be in contact? Is 2 hours in a cool state too long for them to be in contact with each other?