Doctors and Medical Professionals can only make money from diseases. Hence the reason they try to create the idea of a disease for every sympton.
From a capitalist point of view a disease must have symptoms, and be treatable by drugs or activity ( preferably supervised by a doctor that bills your insurance out the ASS )
With this in mind.
Symptoms: A desire to increase lean muscle mass, loose fat, and look like the guys on the cover of Muscle Mags
Disease: BodyBuilding
Marketed treatment: The purchase of over priced useless supplements.
Who benefits? Supplement companies and the few BodyBuilders they sponsor.
Who Looses? Body Builders
Who Wins? The BodyBuilders who get big by diet and exercise.