UCP1, or Uncoupling Protein 1, is a protein found in the inner mitochondrial membrane of brown adipose tissue. Its primary function is to generate heat by dissipating the proton gradient created during cellular respiration, a process known as thermogenesis. This helps maintain body temperature, especially in cold environments. UCP1 is crucial for the metabolism of fatty acids, allowing the body to convert stored fat into energy. It plays a significant role in energy balance and is of interest in research related to obesity and metabolic disorders, as enhancing its activity may promote weight loss and improve metabolic health.