S-4, also known as Andarine, Andarin, S-40503, or GTx-007, is a SARM that selectively binds to androgen receptors in skeletal muscle tissue. Due to S4's selective nature, the risk of androgenic activity occurring in non-skeletal muscle tissue is significantly mitigated. Due to its efficacy in producing greater bone density, lean muscle, and strength, andarine is used by the medical community to treat muscle wasting, benign prostatic hypertrophy, and osteoporosis. Additionally, research has shown it does not cause aromatization (conversion of testosterone into estrogen), liver strain, or severe HPTA (hypothalamic pituitary testicular axis) suppression.
Serving Size: 1 ml, Serving per container: 30 Serving, Amount Per Serving: 50 mg/ml Andarine S-4
Half Life: 4 – 6 hours.
The typical research dose for cutting is 50 mg for a cycle of 6 to 8 weeks. The cycle should include using the product daily for 5 days and then taking 2 days off for the duration.
High dosages may result in short-term changes in vision due to a metabolite of S4 binding to vision receptors. Changes go away after the SARM is no longer in the system. Some users have shown very slight suppression when using S4. A short, mini post cycle therapy regiment is required; the recovery time is only 2-3 weeks after completion.