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  1. 7 Alleged ‘Synthol Freaks’ Who Went too Far - Muscle & Fitness

    Synthol, a site enhancement oil (SEO), is a chemical that some “bodybuilders” use in order to make muscles appear enormous. It is composed of 85 percent oil, 7.5 percent benzyl alcohol, and 7.5 …

  2. Synthol - Wikipedia

    Synthol (mouthwash), a French brand of liquid painkiller/mouthwash now owned by GlaxoSmithKline Synthetic oil, often referred to by nicknames such as "synthol" and "synthoil"

  3. What is synthol and why are bodybuilders injecting it into their muscles?

    Sep 6, 2024 · This process is known colloquially as “fluffing”. Synthol is a mixture of oil (85% - sometimes sesame, walnut, or paraffin), lidocaine (7.5% - a local anaesthetic) and benzyl alcohol …

  4. Synthol Injections: Uses, Dangers, and More - Healthline

    Jan 14, 2021 · When used for muscle growth, synthol is placed in a syringe and injected deep into the target muscle. Once inside muscle fibers, MCT — the active ingredient of synthol — starts to expand.

  5. What is synthol? uses, abuse and injection effects!

    Apr 20, 2025 · Learn about Synthol, a site enhancement oil used by bodybuilders to temporarily increase muscle size. Discover its composition, uses, risks, injection techniques, and legal …

  6. What Is Synthol And Why Are Guys Using It? - Caliber Fitness

    Taking synthol is a quick and easy way to look big and muscular without actually having to lift weights or be strong! For that reason, it often appeals mostly to younger guys who don’t train properly, or who …

  7. Is Synthol a Steroid? How It Works and Its Risks

    Synthol is not a steroid. Learn the true nature of this cosmetic oil, how it displaces tissue for volume, and the unique, severe health dangers it poses.

  8. Synthol Site Enhancing Oil - What is synthol & how to build synthol ...

    Synthol can be used for two purposes – to increase the size of a synthol muscle or to shape a synthol muscle. Using the biceps as an example, here's how to increase a synthol muscles size:

  9. What Is Synthol and Why Is It One of the Most ... - EssentiallySports

    Nov 27, 2023 · Synthol is associated with permanent muscle degeneration and also causes muscle fibrosis, which results in scarring of muscle tissue, as per Healthline. The only way to get rid of the …

  10. The Truth About Synthol Muscle Injections | CyVigor

    Jul 1, 2025 · Synthol is a site enhancement oil, composed of 85% oil, 7.5% lidocaine, and 7.5% alcohol. It is injected directly into muscles to make them look bigger instantly.