Brown fat does more than keep the body warm. A study published in Nature analysed health records and imaging data from more than 100,000 patients, finding that people with detectable brown fat had lower odds of several health conditions. These included type 2 diabetes, chronic ischaemic heart disease, depression and anxiety. Unlike white fat, which primarily stores energy, brown fat burns glucose and fatty acids to generate heat. Researchers also observed healthier blood sugar and lipid profiles in people with detectable brown fat. However, the findings show associations rather than proof of cause and effect, and further studies are needed to determine whether activating brown fat can improve health.
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