Testosterone enanthate is a slow-acting injectable form of androgenic testosterone. After a deep intramuscular injection, the drug provides a gradual release of testosterone into the bloodstream over a period of about 2-3 weeks. If necessary to maintain normal physiological testosterone levels during androgen replacement therapy, testosterone enanthate injections are usually administered every two weeks at a minimum, although more meticulous clinicians will administer the drug weekly. Like all injectable testosterones, Testosterone Enanthate is very popular among athletes due to its ability to stimulate dramatic increases in muscle mass and strength.