I see all these threads saying you should use the white vinegar to mix..Why cant you use the sterile water that comes with the IGF (igtropin) when mixing. I thought that lasts 72 hours. And if the vial has 100 mcg then shouldnt it be ok to use the water. Im going to b doing 60mcg a day, which means it will only last about 36 hrs beofre i move onto the next vial..