ALDH1 stands for aldehyde dehydrogenase 1, an enzyme that plays a crucial role in the metabolism of aldehydes, which are reactive compounds that can be harmful to cells. This enzyme helps convert these aldehydes into less toxic substances, aiding in cellular detoxification and maintaining overall health. ALDH1 is also significant in various biological processes, including the differentiation of stem cells and the regulation of certain signaling pathways. It has been studied in relation to various diseases, including cancer, where its expression levels can influence tumor growth and response to treatment.