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Ile-Glu-Cys-Gly is a tetrapeptide comprising L-isoleucine, L-α-glutamic acid, L-cysteine, and glycine. L-isoleucine, a branched-chain amino acid (BCAA), supports muscle repair and energy production. L-α-glutamic acid is important for neurotransmitter synthesis and cellular metabolism. L-cysteine is essential for antioxidant defense and protein stability. Glycine contributes to various metabolic processes and supports central nervous system function. This peptide may enhance muscle recovery, support cognitive function, and provide antioxidant benefits.