After HCG is mixed in an amp, how long can it sit before going bad (or does it go bad), do I need to refridgerate it or can it sit out. The only HCG I can get comes in 5000 iu amps but I keep reading about doing 1000 iu's eod mid cycle or 500 eod during very long cycles. Just want to know how I should store it after mixing?

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