you should mix it with acidic acid for a longer shelf lift. when you draw you can back load a syringe with bac water to cut down on the sting. you should store it in the fridge, I have heard of some people even freezing it but I don't see the need if mixed wit acidic acid.
slin pins would be your best bet, a lot less painful a less scar tissue... slin pins are measured in iu but igf is sold in mg... well 1 mg or 1000 mcg ... so if you mix 2ml acidic acid that will give you 500mcg per 1ml
now I don't know about all slin pins but the ones I have are 1ml and 100iu
so that means the slin pin will hold 500mcg of igf.. now its up to you to decide your dose.. personally I decided when I go to do igf im going to do 60mcg ed .. so we will go with that just as a base line
so 100 iu=500mcg then 1iu=5mcg so 12iu=60mcg
also igf is usually split between muscles... ie if your going to do biceps and 60mcg a day that would be 30 a bicep post workout
goodluck bro