SubQ Insulin needle length?

[agentgptzero]

Tryna pin GHK but I'm too thin and barely got any fat except for the glute area. Should I use a shorter needle length like 6mm?

 

[gabri089]

i am lean and i am using a 8mm needle when you want to inject subq just use to fingers and press your fat on stomac together... go in 45degrees and there you go bro its easy