γ-Glutamyl-S-allylcysteine (L-γ-Glutamyl-(S)-Allyl-Cysteine) is a γ-glutamyl peptide derived from Allium sativum L., known for its anti-glycation and antioxidant properties, as well as its ability to inhibit cholesterol biosynthesis.

In a concentration-dependent manner, γ-Glutamyl-S-allylcysteine (0.1-2.5 mg/mL) inhibits the increase in fluorescence intensity at around 440 nm and reduces the free lysine side-chain reaction [2].At a concentration of 2.5 mg/mL, γ-Glutamyl-S-allylcysteine prevents the specific decrease in glycation of BSA α-helical content and the increase in β-fold in vitro [1].At a concentration of 2.5 mg/mL, γ-Glutamyl-S-allylcysteine inhibits the formation of protein cross-linking polymers [2].γ-Glutamyl-S-allylcysteine (10, 40, 160 μg/mL) possesses the ability to scavenge free radicals and chelate metals [2].