Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.
According to The Mayo Clinic , male hypogonadism can begin during fetal development, before puberty, or even during adulthood. In the case of adult hypogonadism, the condition can cause erectile dysfunction, infertility, decrease in beard and body hair growth, decrease in muscle mass, development of breast tissue, and loss of bone mass. The condition can also cause mental and emotional changes similar to those women may experience during menopause. These may include fatigue, decreased sex drive, difficulty concentrating, and hot flashes, The Mayo Clinic reported.