Synthetic testosterone is the main steroid used for building muscle and gaining strength. Some people may seek out Selective Androgen Receptor Modulators (SARMs) due to their perceived safety. HGH is also used for similar benefits, but it's not a steroid because it's a protein-based hormone. Clenbuterol, thyroid hormones, and erythropoietin are other non-steroidal performance enhancers. However, the use of synthetic steroids is not worth it, as they can lead to cardiovascular issues, liver toxicity, infertility, hair loss, acne, and gynecomastia. Sourcing them is also dangerous, as poor-quality steroids may be produced by underground labs, and importing them can lead to arrest. If you are wondering about safe steroid options, a study on short-term use of testosterone enanthate found significant strength and muscle gains. However, even pulsed doses of testosterone can lead to side effects such as acne, irritability, increased body hair, and reduced testicle size. High levels of testosterone can signal the testicles to decrease production, leading to these side effects.