dose your gh after you lift, if you want to take it before bed sure, whatever, but you are right it will suppress your natural gh production. if you get those shitty peptides, like ghrp-6 then your natural gh secretion will be increased provided you don't have any residual synthetic gh in your blood for a couple hours beforehand but peptides other than ghrp-6 and cjc-1295 with dac, are all underdosed or baloney except from maybe 1 research company (possibly, don't know for sure without lab tests) but they are more expensive than kigs so it's not worth it.