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Andarine (S4) is a selective androgen receptor modulator (SARM) designed for cutting, lean muscle retention, and increased vascularity. A go-to for body recomposition.
Andarine (S4) is an investigational drug and a member of the SARMs (Selective Androgen Receptor Modulators) class. Originally developed for treating muscle wasting conditions (cachexia) and osteoporosis, S4 gained popularity in research settings for its ability to selectively stimulate androgen receptors in muscle and bone tissue.
| Status Area | Classification & Risk |
| FDA Status | NOT APPROVED for human consumption or use in dietary supplements. Illegal for supplement companies to sell for human use. |
| Safety Warning | POSSIBLY UNSAFE. Use has been associated with adverse effects, including liver damage, stroke, heart attack, and visual disturbances (e.g., altered perception and colors). |
| WADA Status | PROHIBITED at all times for athletes under the World Anti-Doping Agency (WADA) Prohibited List. |
| Legal Status | Classified under the Poisons Standard in some regions; access without proper authority may be illegal. |
Andarine is known to be an orally active partial agonist of the Androgen Receptor (AR). In research models, its mechanism demonstrated:
Tissue-Selective Anabolism: Exhibits a higher affinity for ARs in skeletal muscle and bone compared to prostate tissue.
Muscle Growth Potential: When bound to androgen receptors, it signals muscle and bone tissues to grow.
Anti-Proteolytic Action: Research suggested potential to inhibit the binding of more potent androgens like DHT in tissues like the prostate.
In unregulated, anecdotal online reports, individuals have claimed to use Andarine for:
Increased Lean Muscle Mass
Enhanced Fat Loss
Improved Strength and Endurance
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