Endogenous melatonin is in the realm of 5-25mcg, I've had great success supplementing 150mcg. Better results than with 3mg even. Consider trying a microdose.

Endogenous melatonin is in the realm of 5-25mcg, I've had great success supplementing 150mcg. Better results than with 3mg even. Consider trying a microdose. Especially given that you are dealing with a developing brain and melatonin is a hormone.