how long is gh ok after reconstituting

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I was told after mixing that you have to use the vial wthin 96 hours is this true?

and i know to refrigerate after mixing but should i refrigerate unmixed vials???

depends on what you constitute it with, if you use bacteriostatic water and refrigerate it should be good for a month. you don't have to refrigerate the powder but it won't hurt it if you do.