Synthol, which was developed in the early 1990s by the German bodybuilder Christopher T. Clark as a replacement for Esiclene which went out of production at the time. Synthol consists of 85 % medium-chain triglycerides, 7.5 % Lidocaine and 7.5 % Benzyl alcohol. It is a liquid substance, a mixture of oils, used by some bodybuilders to increase the apparent size of some muscles. The effects of Synthol are purely and solely cosmetic and there is no increase in muscular performance. Synthol works by filling the muscle up with an oil substance. It is site-injected, that is, it is injected directly into the muscle whose size is to be increased. Synthol is usually used to ‘top up’ a muscle that is not quite up to standard with the rest of the body.