S-4, commonly known as Andarine, is a selective androgen receptor modulator (SARM) developed to support muscle hardness, strength maintenance, and physique conditioning. It is widely positioned for cutting and recomposition phases, where definition, density, and performance are priorities. S-4 is designed to selectively target muscle and bone tissue, supporting a lean, dry appearance while helping maintain training output during calorie-restricted phases. Key Benefits Supports muscle hardness and definition Helps maintain strength during cutting phases Supports lean muscle retention Assists with conditioning and physique refinement Supports bone density and structural strength Non-aromatising (does not convert to estrogen) Popular for cutting and recomp protocols
