S4, also known as Andarine, is a selective androgen receptor modulator (SARM) favoured by bodybuilders and athletes for its ability to support lean muscle growth and fat loss. When combined with a proper training program, studies suggest S4 can significantly enhance muscle mass while promoting a more defined, shredded physique.
Its dual benefits of muscle-building and fat-burning make it a go-to option for those aiming to improve body composition and performance.
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