Anabolic steroids bind to androgen receptors in muscle cells, enhancing protein synthesis, which leads to rapid muscle growth; thus, an individual using steroids may exhibit unusually large muscle mass, particularly in the upper body.
The ‘yoked’ appearance, characterized by pronounced neck and shoulder muscles, often occurs because these areas have a higher density of androgen receptors, resulting in disproportionate muscle development when steroids are used.
Steroid use can lead to pronounced acne, especially on the back and shoulders, due to increased sebum production from enlarged sebaceous glands, which can be visually identifiable on the skin.
Users may experience stretch marks, particularly on the upper arms, thighs, and lower back, as rapid muscle growth can cause the skin to stretch faster than it can adapt, leading to dermal tears.
Swelling in the face, commonly referred to as "moon face," can occur as a result of water retention, which is sometimes associated with steroid use, affecting how a person’s face appears.
Men may develop gynecomastia, or enlarged breast tissue, due to altered estrogen levels resulting from steroid use, which can visually manifest as breast development that isn't typical for males.
A common side effect of steroids is hair loss in males; this occurs because steroids can accelerate male-pattern baldness in those predisposed to it, leading to a distinct receding hairline or thinning hair on the crown.
Steroids can cause an increase in body hair (hirsutism) due to the increase in testosterone levels, resulting in facial hair or darker body hair in women, which can be a noticeable change.
Individuals on steroids may exhibit an increased vascularity, or a more pronounced vein structure, particularly in the arms and legs, as steroids can cause blood volume expansion and a decrease in body fat.
The phenomenon called "roid rage" can manifest as overexaggerated aggression and irritability, behaviors that can be noticeable during interactions, often stemming from hormonal fluctuations caused by steroid use.
Using steroids may lead to swollen joints and tendons due to increased muscle mass that outpaces the strength and stability of connective tissues, which can be visually identifiable as larger-than-usual joints.
Some users may develop a hoarse voice, particularly women, due to androgenic properties of steroids which can cause changes in the vocal cords, producing a deeper voice over time.
'Water retention' from steroids can result in puffy body parts, particularly the arms and legs, where the body retains excess fluid, altering the overall physique in subtle ways.
The distinct odor of steroid use can be noticeable as some steroids metabolize through the sweat glands, producing a different body odor that can be recognized even from a distance.
A person may display symptoms of hormonal imbalance, such as the development of a pot belly appearance or abdominal distension, due to the increased production of cortisol, particularly when certain steroids are abused.
Increased appetite and changes in dietary habits can be noticeable, particularly due to higher caloric needs associated with muscle gain from steroids, influencing how a person selects meals and portions.
One sign could be an elevated baseline of physical fitness often uncharacteristic for the individual’s previous performance levels—this can present as improved endurance or strength that seems disproportionate to their training experience.
Users may present with hypertension as a side effect of anabolic steroids, which can alter observable traits such as facial flushing, especially during physical activity, when blood pressure spikes.
Changes in mood and energy, including symptoms of anxiety or hyperactivity, can lead to erratic behavior changes that might become increasingly noticeable to peers in their social circles.
Lastly, long-term steroid use can lead to permanent physiological changes in sexual organs, such as atrophy of the testicles in men, which can be visually noticeable and indicative of prior steroid use.