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S-4 (Andarine), 25 mg

4.68 out of 5
(137 customer reviews)




S-4 (Andarine) Research Profile:


Description: 1st gen SARM; a tried-and-true anabolic; moderate metabolic enhancements; effects often cited as a dry, hard, lean, etc.

Known for: Increasing muscle mass and hardening appearance.

Commonly stacked with: Typical bulking stack: S-4, YK-11, MK-677 | optional: MK-2866

Side-effects: Testosterone suppression with prolonged use; temporary blurry or "yellow tint" vision in some users


S-4 (Andarine) Chemical Profile:

Clinical data

Selective Androgen Receptor Modulator
S4, S-4, Andarine, Andarin, Acetamidoxolutamide, Androxolutamide, GTx-007
By mouth
US: Investigational New Drug
GTX, Inc.

Pharmacokinetic data

4-6 hours


(2S)-3-(4-acetamido-phenoxy)-2-hydroxy-2-methyl-N- (4-nitro-3-trifluoromethyl-phenyl)-propionamide

Chemical and physical data

441.357 g/mol
FC(F)(F)c1cc(ccc1[N+]([O-])=O)NC (=O)[C@@](O)(COc2ccc(cc2)NC(=O)C)C
1S/C19H18F3N3O6/c1-11(26)23-12-3-6-14 (7-4-12)31-10-18(2,28)17(27)24-13-5-8-16(25(29)30) 15(9-13)19(20,21)22/h3-9,28H,10H2, 1-2H3,(H,23,26)(H,24,27)/t18-/m0/s1


* These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Selective Androgen Receptor Modulators (SARMs) have not been approved in the US by the FDA for human consumption as dietary supplements. In accordance with US laws pertaining to the use of Investigational New Drugs (IND's) products labeled as SARMs on this website are sold for laboratory and clinical research purposes only, are intended solely for investigational use, and are to be used exclusively for purposes of a clinical trial that is the subject of an effective investigational new drug application; otherwise, you are not authorized to purchase our products. By using this site and/or purchasing our products, you certify you and/or your organization is/are qualified to possess, handle, and administer the products you purchase, that SARMTECH and its owners/agents are not liable for any unintended effects or outcomes, and that you are 21 years of age or older.


137 reviews for S-4 (Andarine), 25 mg

  1. 4 out of 5

    Anonymous (verified owner)

    Have been testing this for about 3 weeks now and have already noticed more vascularity. Will definitely be testing this again.

  2. 5 out of 5

    Christian Abanes (verified owner)


  3. 3 out of 5

    Yujin C. (verified owner)

    Haven’t used it yet will re-evaluate when I do.

  4. 4 out of 5

    Anonymous (verified owner)

    Good gains, leaning effect also. Good stuff.

  5. 5 out of 5

    Benjamin S. (verified owner)

    This stuff was very strong, strength increases insane and size increases were very noticeable

  6. 5 out of 5

    Anonymous (verified owner)

    This is the best on the market

  7. 4 out of 5

    Christopher Pleimann (verified owner)


  8. 3 out of 5

    Anonymous (verified owner)


  9. 4 out of 5

    Anonymous (verified owner)

    Vision side effect lets the subject know it is legit.

  10. 5 out of 5

    Anonymous (verified owner)


  11. 4 out of 5

    Jason K. (verified owner)

    I use this because I will go several days without lifting due to my type of work and have notice no loss in muscle.

  12. 5 out of 5

    Patrick G. (verified owner)

    Brilliant product, benefits outweigh the yellow tint

  13. 4 out of 5

    Dylan (verified owner)


  14. 5 out of 5

    william gibbs (verified owner)


  15. 5 out of 5

    Anonymous (verified owner)

    Product worked great!

  16. 5 out of 5

    Anonymous (verified owner)

    Subject has shown increased strength and muscle growth. Will definitely recommend to anyone on the fence about it. Incredible product.

  17. 5 out of 5

    Anonymous (verified owner)


  18. 4 out of 5

    Chris A. (verified owner)

    8 weeks in and more cut, dense and seeing more veins.

  19. 5 out of 5

    Anonymous (verified owner)


  20. 5 out of 5

    Anonymous (verified owner)

    excellent !!

  21. 5 out of 5

    Richard E. (verified owner)

    Research subject experienced retention of muscle mass even when not lifting for short periods.

  22. 5 out of 5

    Edward Woodruff (verified owner)


  23. 4 out of 5

    Anonymous (verified owner)

    Good results at 75mg per day split up. Vision issues when more that 75mg per day, but went away when lowered dosage.

  24. 5 out of 5

    Shane (verified owner)

    Best shit in the game

  25. 5 out of 5

    Anonymous (verified owner)

    Subject exhibited lean muscle growth as well as lowered water retention within a few weeks of oral administration. Minimal side effects with maximal results

  26. 5 out of 5

    Mike Vamos (verified owner)

    Highly effective in gainz! I can see it from lifting heavier weights.

  27. 5 out of 5

    Seungwoo H. (verified owner)

    Great result after 12weeks.

  28. 5 out of 5

    C Lewis (verified owner)


  29. 5 out of 5

    Sam S. (verified owner)

    For a cutting and getting ripped SARM this is a go-to. One capsule in the morning and one before the evening workout will get your test subject lean and hard. Be sure to take the weekends off to avoid vision issues.

  30. 4 out of 5

    Anonymous (verified owner)

    Not a fan of the vision issues

  31. 5 out of 5

    barak k. (verified owner)


  32. 5 out of 5

    Anonymous (verified owner)

    Love this Anadarine, highly recommend

  33. 5 out of 5

    Anonymous (verified owner)


  34. 4 out of 5

    Anonymous (verified owner)

    50mg a day. Good strength gains

  35. 4 out of 5

    ELFATIH AJALA (verified owner)

    Andarine is a great SARM and easily stacks with others for great research, and elimination of fat. My testing was only 6 weeks but am doing a full 10 weeks to complete the total test. There was very little or no suppression so no PCT was needed in the research. Great product, a bit pricey; might go back to mixing my own with glycerin. Cheaper and no additives.
    Great store, great customer service.

  36. 5 out of 5

    Nelson (verified owner)

    Best thus far

  37. 5 out of 5

    barak k. (verified owner)


  38. 5 out of 5

    Garrett (verified owner)


  39. 5 out of 5

    Anonymous (verified owner)


  40. 4 out of 5

    Mark C. (verified owner)


  41. 3 out of 5

    Jesse B. (verified owner)

    Stacked with RAD140 on six week cycle. Subject def saw some mass gains, nothing crazy though.

  42. 4 out of 5

    Patrick (verified owner)


  43. 5 out of 5

    Ivan B. (verified owner)


  44. 4 out of 5

    Eric Kearsh (verified owner)


  45. 5 out of 5

    Chriatian Powell (verified owner)

    A tad of the vision sides at 1 cap a day, so it is definitely working, subject looking alot leaner

  46. 5 out of 5

    Cristian Figueroa (verified owner)


  47. 5 out of 5

    Nathan (verified owner)


  48. 5 out of 5

    Jared P. (verified owner)

    S4 compliments any SARM you’re planning on testing, and helps with fat loss tremendously

  49. 4 out of 5

    Russell H. (verified owner)


  50. 4 out of 5

    matthew (verified owner)


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S-4 Andarine SARM Capsules
S-4 (Andarine), 25 mg