Hormonal
Cool environmental temperatures (27–33 °C) directly activate a thermogenic gene program (including Ucp1 and Pgc1a) in white and beige adipocytes in a cell-autonomous manner, independent of the sympathetic nervous system and beta-adrenergic receptors.
This research suggests that your fat cells can directly sense cool temperatures and start burning energy, independent of your nervous system's stress response. While you don't need to freeze yourself, keeping your living environment slightly cooler (around 68-72°F or 20-22°C) may naturally support your body's ability to burn calories through this direct cellular mechanism, particularly in subcutaneous fat.
here we report that cool temperature (27–33 °C) can directly activate a thermogenic gene program in adipocytes in a cell-autonomous manner. White and beige fat cells respond to cool temperatures, but classic brown fat cells do not. Importantly, this activation in isolated cells is independent of the canonical cAMP/Protein Kinase A/cAMP response element-binding protein pathway downstream of the β-adrenergic receptors.
Why this rating
Strong in vitro and ex vivo evidence using multiple cell lines and primary cells, supported by in vivo data in beta-less mice, but lacks direct human clinical outcome data.
Source
Fat cells directly sense temperature to activate thermogenesis
Li Ye et al. · Proceedings of the National Academy of Sciences · 2013
DOI 10.1073/pnas.1310261110
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