Brown adipocytes, or brown fat cells, are a type of fat tissue that plays a crucial role in thermogenesis, the process of heat production in the body. Unlike white adipocytes, which store energy, brown adipocytes contain numerous mitochondria and are rich in iron, giving them a brown color. They help maintain body temperature, especially in cold environments, by burning calories to generate heat. These cells are primarily found in newborns and hibernating mammals, but recent studies suggest that adults also have small amounts of brown fat, particularly around the neck and shoulders. The presence of brown adipocytes is linked to improved metabolism and may offer potential benefits for weight management and combating obesity.