HGH - why some makes me fall asleep others don’t ?

Anyone know why some batches of HGH don’t make you sleepy. Some can even screw up sleep.

Then others make you fall asleep about 1/2 hour after dose.

Both give carpel tunnel. Both improve skin. Both elevate IGF 1 by bloods.

I love the ones which literally make me fall asleep, i almost have as a sleeping aid, take my dose and I know I’ll be out cold in under 1/2 hour