Hormonal
SIRT3 activation in brown adipocytes enhances mitochondrial function and thermogenesis by upregulating PGC-1α and UCP1, leading to increased oxygen consumption and reduced reactive oxygen species.
While you cannot directly 'dose' SIRT3, this research highlights that caloric restriction and cold exposure naturally upregulate SIRT3 in brown fat. This suggests that incorporating cold exposure (e.g., cold showers) and managing caloric intake may support mitochondrial health and thermogenesis via this pathway.
Enforced expression of SIRT3 in the HIB1B brown adipocytes enhances the expression of the uncoupling protein PGC-1α, UCP1, and a series of mitochondria-related genes... Functionally, sustained expression of SIRT3 decreases membrane potential and reactive oxygen species production while increasing cellular respiration.
Why this rating
Strong mechanistic evidence in cell lines and mouse models, but lacks human clinical data.
Source
SIRT3, a Mitochondrial Sirtuin Deacetylase, Regulates Mitochondrial Function and Thermogenesis in Brown Adipocytes
Tong Shi et al. · Journal of Biological Chemistry · 2005
DOI 10.1074/jbc.m414670200
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