Tauroursodeoxycholate dihydrate (Standard) is the standard substance of Tauroursodeoxycholate dihydrate, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Tauroursodeoxycholate (TUDCA ,Taurolite) dihydrate is a water-soluble bile acid with endoplasmic reticulum stress inhibitory, mitochondrial stabilizing, and anti-apoptotic effects, which significantly reduces the expression of apoptotic molecules, such as Caspase-3 and Caspase-12, and inhibits ERK, reducing endoplasmic reticulum stress mediated cell death.