Anabolic–androgenic steroids (AAS) are man-made drugs that are similar to the male hormone testosterone. Most steroids are injected. Some steroids may be taken by mouth.
Healthcare providers sometimes prescribe steroids to:
Some athletes use AAS to build muscle and improve performance. However, AAS can have many serious side effects.
Anabolic steroids increase the body's ability to make proteins and build them into muscle tissue. Combined with a high protein diet, AAS will increase muscle mass and body weight.
If you have any questions, ask your healthcare provider or pharmacist for more information. Be sure to keep all appointments for provider visits or tests.