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Andarine, commonly known as S4 in the market, comes under umbrella of wide group of drugs called SARM (Selective Androgen Receptor Modulator), but S4 is considered to be more potent and beneficial as compared to other similar SARMs like LGD-4033. It was first manufactured by GTX labs during its research aiming for treatments of senile- onset muscle wasting diseases like muscular dystrophy, osteoporosis and benign enlargement of prostrate.