Hey Dylan. I'm 53 and have been on doctor prescribed TRT for 2 years now. I self inject 100mgs every 7 days. Been doing a lot reading on the boards and on the net. What seems to popular and guys saying is better is to split the dose into 2 injections every 3.5 and half days. I currently use a 25 gauge needle.. 1 inch for glute injections. What are your thoughts on splitting the dose ? Does it matter? Thanks buddy.