Synthol consists usually of oil, benzyl alcohol and lidocain. It consists of 85% of oil (normally it is oil built by medium-length MTC chains because it gives the best effects), 7,5% of lidocain (painkiller), 7,5% of alcohol (to sterilize the mixture). Synthol is a substance used by body builders as a temporary implant which is injected deeply into the muscle. The enlargement effects are immediate. Synthol is used in small groups of muscles to enlarge their volume (for example triceps, biceps, deltoids, muscles of the calf). Some serious drawbacks can be visible while using synthol. The muscles deform and become unnaturally shaped. The side effects of synthol are manifold and they can also cause a damage of nerves, oil embolic of the pulmonary, occlusion of the pulmonary artery, myocardial infarction, cerebral stroke and infectious complications.