Anabolic steroid users often say that they experience a feeling of euphoria (feeling high) or improved self-esteem (feeling better about themselves). Others say they have mood swings, violent or aggressive behaviour ('roid rages'), become paranoid or depressed. As only a limited amount of research has been done in this area, it is difficult to be certain whether a particular anabolic steroid user will get any or all of these side effects. If you think you are experiencing any of these side effects, you should discuss them with your doctor.
Anabolic processes tend toward "building up" organs and tissues . These processes produce growth and differentiation of cells and increase in body size, a process that involves synthesis of complex molecules . Examples of anabolic processes include the growth and mineralization of bone and increases in muscle mass. Endocrinologists have traditionally classified hormones as anabolic or catabolic, depending on which part of metabolism they stimulate. The classic anabolic hormones are the anabolic steroids , which stimulate protein synthesis, muscle growth, and insulin .  The balance between anabolism and catabolism is also regulated by circadian rhythms , with processes such as glucose metabolism fluctuating to match an animal's normal periods of activity throughout the day.