Desaminotyrosine (DAT) is a human metabolic product, which is one of the products of tyrosine metabolism. It is a colorless crystalline solid with strong reactivity of amino and phenolic groups. DAT is excreted in the human body primarily through the kidneys,but it can also be excreted through other routes such as the intestines, sweat, and saliva. DAT metabolism is associated with the occurrence and development of some diseases, such as chronic kidney disease, diabetes, etc. Therefore, DAT is also used clinically as a biomarker to assess the metabolic status of the human body.