I mix 5000iu of Fertigyn and typically use it (250 iu twice a week) over the following 6 weeks for a total of 7 x 250 x 2 = 3500iu's. That's 1500iu's I'm throwing away because of the 6 week shelf life.
Would it make sense to use it an extra 2 weeks (for a total of 8 weeks) but pulling 300iu's rather than 250iu's to compensate for the decreased potency?