L-Cystathionine dihydrochloride (Standard) is the analytical standard of L-Cystathionine dihydrochloride (HY-W009749C). This product is intended for research and analytical applications. L-Cystathionine dihydrochloride is a nonprotein thioether and is a key amino acid associated with the metabolic state of sulfur-containing amino acids. L-Cystathionine dihydrochloride protects against Homocysteine-induced mitochondria-dependent apoptosis of vascular endothelial cells (HUVECs). L-Cystathionine dihydrochloride plays an important role in cardiovascular protection.