Synthol (mouthwash)

Synthol is a Site Enhancement Oil (SEO), a liquid substance, usually a mixture of oils, used by a few bodybuilders to increase the apparent size of some muscles. The effects of synthol are purely and solely cosmetic. It is injected either under the skin or between the muscle fibers.

Many doctors advise that use of synthol is extremely dangerous, if not potentially fatal, as injection into a major blood vessel can cause embolism, leading to heart strokes, respiratory crisis and/or permanent brain damage if Synthol traces find their way into cerebral vessels..

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 really only used to 'top up' a muscle that is not quite up to standard with the rest of the body, and once the use of Synthol is stopped, all gains are lost, because the oil is soaked up into the muscle.

Synthol is not an androgen, and does not contain steroids, It is an oil that will remain in circulation for years in the body and it will tend to damage and scar the actual muscles. It is simply a cosmetic that creates scar tissue within the muscle to make it look like it has been trained hard.