The Fluid Proteins Test is a laboratory analysis performed to measure the concentration and types of proteins present in body fluids, such as blood plasma, serum, cerebrospinal fluid, urine, or other biological fluids. Proteins in these fluids play crucial roles in maintaining physiological balance, immune response, and tissue repair. Abnormal levels or patterns of proteins can indicate various medical conditions, including infections, inflammatory diseases, liver or kidney disorders, and certain cancers.