Se-Methylselenocysteine is a naturally occurring compound found in garlict ,is a methylated derivative of the amino acid selenocysteine. Se-methylselenocysteine is readily absorbed and metabolized through a unique pathway that bypasses the toxic intermediate hydrogen selenide, It is widely studied for its potent antioxidant properties, immune-supporting effects, and its role in cancer prevention, particularly in inducing apoptosis (programmed cell death) in malignant cells while sparing normal tissues.