Synthol is composed of 85% medium-chain triglyceride oils (a
fatty acid), 7.5% lidocaine (painkiller), and 7.5 5 benzyl alcohol.
The preparation is injected deep into the muscle where it is
encapsulated between the fascicles (bundles of muscle fibers) .
With repeated injections, a larger volume of oil builds up inside
the muscle, expanding its size like a balloon filling up with air.
About 30% of what is injected is metabolized by the body. The other
70% remains lodged in the muscle where it breaks down very slowly
over three to five years -bodybuilding.com
