hey guys, was wondering i have my hgh in powder form (unmixed) and that is good for supposedly a yr on the shelf (room temp) unmixed.....but when i mix it with the bac water do i have to store it in the fridge immediately?? does it have to be cold for 1st use or just thereafter?? i am wondering how i store my 10iu bottle of hgh each week as its mixed bc that will last me for about a week or 5 days or so.....thanks guys!!!