TRPM6 (Transient Receptor Potential Cation Channel Subfamily M Member 6): TRPM6 is a channel that plays a crucial role in magnesium (Mg) absorption and homeostasis. It is vital for maintaining the proper magnesium balance in the body, and mutations in TRPM6 can lead to hypomagnesemia with secondary hypocalcemia, a condition characterized by low levels of magnesium and calcium (Ca) in the blood.