Individuals using anabolic steroids might experience which of the following?

Individuals using anabolic steroids often experience testicular atrophy as a physiological side effect. This occurs because anabolic steroids can disrupt the normal hormonal balance in the body. When exogenous testosterone (from anabolic steroids) is introduced, the body senses an overload of testosterone and may reduce its own production of the hormone. This feedback loop can lead to a decrease in the size and function of the testes, resulting in testicular atrophy. This effect highlights the potential impact anabolic steroids have on the endocrine system and reproductive health.

In contrast, the other options may not be directly related to anabolic steroid use in the same way. Increased reflexes are not commonly associated effects of steroid use, though some users may feel more energetic or stronger due to increased muscle mass. Flushing, which typically refers to sudden reddening of the skin, is more commonly associated with substances like alcohol or niacin rather than anabolic steroids. Elated mood might occur as a result of some users experiencing heightened confidence or mood changes, but this is not a universally experienced effect and can vary greatly among individuals using steroids. Therefore, testicular atrophy stands out as a definitive and well-documented consequence of anabolic steroid use.