Ergothioneine (CAS: 497-30-3) is a rare, naturally occurring sulfur-containing histidine derivative, first isolated from the ergot fungus (Claviceps purpurea) and now found abundantly in mushrooms (e.g., porcini), animal liver, and human erythrocytes. Its unique mercaptoimidazolone structure confers exceptional redox capabilities, making it a potent antioxidant. In 2022, the FDA classified it as GRAS (Generally Recognized as Safe), while the EU EFSA approved it as a novel food ingredient (2021/C 456/03).
Product Name: Ergothioneine
IUPAC Name: (2S)-3-(2-Thioxoimidazolidin-4-yl)-2-(trimethylammonio)propanoate
CAS No.: 497-30-3
Molecular Formula: C₉H₁₅N₃O₂S
