Tried oxytocin once with limited dosing info. It has like a six minute half life so that's tricky. Felt okay briefly then warm then hot like a way amplified flush then just tired. Next day felt sick with headache and down the whole day. Probably not for me but maybe nasal spray form is different.
Skeptical about that organ enlargement claim. What research shows this happens? Only thing I've heard linked to that is high-dose human growth hormone, not this.