Synthol isn't a steroid but an oil that causes muscles to swell when injected. Abuse on the filler usually leads to Unwanted side effects like contaminated, bulbous human body parts, fatty lesions and long-expression disfigurement.S? the d?v?l??m?nt ?file f????l h??r, ?n?r???? ?n muscle mass m??? ?nd the ?th?r indications of puberty ?r? ??tu?ll?