If he were to be using anabolic steroids, what would be the side effects you would look for?
In male users, you would expect reduced sperm count, decrease in testicle size, and increase in breast size.
In female users, you can expect increase body hair, rough skin, decreased breast size, enlarged clitoris, and deepened voice.
Side effects that would be common to both are hypertension, increased risk of heart attack, increased risk of stroke, high LDL, low HDL, liver disease, increased cancer risk, acne, male pattern hair loss, irritability, aggression, and violence.