SweetYou add as much as you want bac water. If your powder IGF-1 LR3 has 1 mg(for example), that's 1000 mcg. If your bac water contains 10 ml and you mix it with 1 mg IGF-1 LR3, you will receive 100 mcg from every ml. If your bac water contains 20 ml (for example) and you mix it with 1 mg powder of IGF-1 LR, you will receive only 50 mcg from every ml. I guess you got the idea.