Of course diarrhea means you are not absorbing all of the nutrients. You eat, it shoots right out, why do you think it normally takes longer before you poop? To properly digest and utilize the food.
First, pull down your pants. Locate your balls. Give them a feel and make sure they haven’t been replaced by a pussy.
Swap the intended injection site & top of vial, draw your shot up, and stick the needle in, same as a subq shot except at 90* to the muscle instead of trying to slip it under the skin at an acute angle.
“Ain’t nothin’ to it but ta do it” - Ronnie Coleman, the king