There are a couple of factors that can lead to bodybuilders getting acne on their beautifully sculpted muscles.
One is the use of whey protein that many of them use. It is incredibly effective at promoting muscle growth because it promotes the production of certain growth factors that are linked to muscle cell growth. However, it is a dairy product and dairy is well known to enhance insulin/insulin-like growth factor 1 signaling and aggravating acne. Dairy products are also high in iodides which also aggravate acne.
The other factor in bodybuilder acne is the use of steroids in building muscle. It is well-known that steroids can cause acne.
For more information on how to have clear skin, go to Face Reality Acne Clinic.