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  • S4 (Andarine)

    What is S4?

    S4, also known as, Andarine, is a SARM (Selective Androgen Receptor Modulator). SARMs bind to the androgen receptors in bone and muscle tissue and improve their anabolic activity.

    S4 was designed to treat conditions such as muscle wasting, osteoporosis and for prostate hypertrophy. Not only does S4 helps to preserve muscle mass but research has shown that it is also very effective at increasing lean body mass, although not as effective as some other SARMs, such as Ostarine.

    S4, however, really shines when it comes to fat loss and muscle hardening. Some users have reported that its muscle hardening effects can be compared to those of the anabolic steroids, Winstrol and Anavar, but with much less side effects. Of course, the results won’t be as extreme as the steroids but with fewer side effects, it is a good trade off.

    Due to its muscle preserving nature, S4 has also been shown to be a great tool for body recomposition, as it helps to preserve muscle, even in a calorie deficit. In some cases, it has also shown to increase LBM but that, of course, depends on the severity of the deficit.

    Benefits of using S4

    • Increased lean body mass
    • Accelerated fat loss
    • Increased strength gains
    • Improved vascularity
    • Improved muscle hardening
    • Improved endurance
    • Does not dry out joints like other cutting drugs
    • Few side effects
    • Does not aromatize to estrogen
    • Non-methylated, does not affect the liver or blood pressure

    Side effects

    Side effects are rare with S4 but when ran at doses higher than 50mg daily, some users have reported problems with their vision. It takes a longer time for the eyes to adjust to light and night vision seems to suffer the most. These effects, however, are not permanent and are reversed within the first week of stopping use. A 5 day on 2 day off protocol has been suggested for those choosing to run 50mg+ of S4 as it has shown to help reduce vision problems.

    Mild suppression has also been noted at higher doses and therefore a proper PCT protocol is recommended after use.

    Dosage/Cycle length

    For bulking, a dose of 40-50mg, split in to 4 daily doses, is recommended for 6-8 weeks. Can be stacked with Ostarine for increased lean gains.

    For cutting, a dose of 30-50mg, split in to 4 daily doses, is recommended for up to 6-8 weeks.

    For body recomp, a dose of 50mg, split in to 4 daily doses, is recommended for 4-8 weeks.

    Where can I find S4? has just recently added some SARMs to their store.

    You can find S4 in the product, Tri-SARM, at a dose of 10mg per capsule.

    Cycle responsibly!
    Comments 3 Comments
    1. MuscleAddiction's Avatar
      MuscleAddiction -
      Yeah, the yellow vision is no joke. 5 on/2 off is a good protocol.
    1. cane's Avatar
      cane -
      yea. this is the only sarm i wasnt a big fan of.It was due to the vision sides.Its really case dependant.Some people get it bad and some hardly get it at all.Sorry to say with me, even 5/2 off, my eyes were still bothering me way to much.
    1. ceo's Avatar
      ceo -
      I felt like Stevie Wonder.
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