Taurodeoxycholic acid (Taurodeoxychloic acid) is a bile acid taurine conjugate of deoxycholic acid, a human metabolite that stabilizes mitochondrial membranes and reduces the formation of free radicals.Taurodeoxycholic acid inhibits apoptosis by blocking calcium-mediated apoptotic pathways and by activation of caspase-12. Taurodeoxycholic acid has neuroprotective activity and has been used to study 3-nitropropionic acid-induced or stabilized hereditary Huntington's chorea (HD).