Some bodybuilders, murderous thugs working for Hafez Assad, and at least one really unfortunate Brazilian shaped like a piece of popcorn use "site enhancement oil," commonly known as synthol. It mimics the appearance of developed muscle, but adds no stength what so ever.
Use of synthol can cause pulmonary embolisms, nerve damage, infections, stroke, and the formation of oil-filled granulomas, cysts or ulcers in the muscle.
“This is the official website of the Mixed Martial Arts llc. Commercial
reproduction, distribution or transmission of any part or parts of this website
or any information contained therein by any means whatsoever without the prior
written permission is not permitted.”