Your body produces HGH in pulses. Your biggest pulse is at night when you're in deep sleep (a few hours after you fall asleep I believe). At other times during the day or night it can be absolutely zero. That's why measuring your hgh level isn't an indicator of what it really is. You'd want to test it during the peaks of your pulses, and not just any random time, which is hard to do. That's why you check IGF-1 levels. You're IGF-1 is an indicator of how healthy your HGH pulses are, and also a good way to measure the effectiveness of any HGH you may be injecting. When you inject HGH it takes a good month for your IGF-1 levels to peak so you'd wait a bit to check it. That's why it's a good idea to get your baseline IGF-1 levels before using HGH so you have something to compare your elevated levels too and be able to see how effective your HGH is.

Mine was <0.1 and I'm 27. You're good bro