My HCG comes in a 10ml vial along with 30ml bottle of bac water. Not sure why they send the extra water but I save it to reconstitute melanotan. The HCG powder vial holds 10,000iu so 10ml water gives me 1000iu/ml. I run HCG year round as part of my TRT at a dose of 250iu EOD. At this dose 10,000iu will last 80 days. The problem is that after reconstituted HCG begins to lose potency after 30 days in the fridge. My fix for this is to draw the majority of my doses into insulin syringes along with a little air and then freeze. Hope this helps with what your trying to accomplish.