Please tell me how long it takes for to feel the effects of a testosterone injection?

Testosterone Effects: The ester will determine half life but feeling/seeing effects really depends on other hormones and enzymes interacting on the testosterone. Assume 2-3 weeks to determine noticeable effects; maybe sooner for test prop but again, it depends wildly for individual. If you dont see/feel changes you may have to switch delivery (inject vs cream), frequency or check other hormone interaction.