For those who do not know, 4 IU is the recommended dose of hgh to take when your goal is to lose weight or to build your body muscles. You can increase the dose up to 6 IU if you want to. However, you may experience some side effects if you are taking 4 IU or higher. You might feel some tingling effect in your fingers. The solution for this is to lower your dose for a while until the tingling effect is gone. After that, you can go back to your regular dose of 4 IU.