Albumin is a type of PROTEIN found in the blood and other bodily fluids. It is an important component of the body's fluid balance and helps to transport hormones, vitamins, and other substances throughout the body. Albumin is also used as a marker for kidney function and is often used to diagnose and monitor diseases such as liver disease, kidney disease, and cancer. Albumin is also used in the food industry as a stabilizer and emulsifier.