Biochem/physiol Actions Sulfur-containing amino acid that is converted to allicin by alliinase. Allicin is cytotoxic to several mammalian cancer cell lines and can protect against tumor formation induced by various exogenous chemical carcinogens. L-Alliin (S-Allyl-L-cysteine sulfoxide) is an amino acid derived from L-cysteine. S-Allyl-L-cysteine Sulfoxide (ACSO) is an anti-atherosclerotic compound with antioxidant and anti-inflammatory activities. General description Constituent of garlic (Allium sativum)1 Protocols & Applications Onion (Allium cepa) Plant Profile: bioactives, mechanism of action, references