Cold Exposure is Exciting for Brown Fat

Did you know that cold exposure can actually increase your brown fat mass and activity? A recent study followed two groups of Swedish people for six weeks in the wintertime and measured their metabolic rates as well as their brown fat levels. One group spent 60 minutes every day in front of a window wearing only a light covering of clothing, while the other group stayed warm and avoided the cold. The group exposed to the cold had small increases in metabolic rate and brown fat levels. Additionally, people who live in cold climates such as Finland have been found to typically possess higher levels – up to 10 percent of their total fat mass – of brown fat overall. Cold exposure can be dangerous and would take a very long time to be truly effective, so the real practicality of this study is unclear. 

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