Energy balance
Activation of SIRT3 via caloric restriction, fasting, or exercise enhances mitochondrial antioxidant defenses (specifically MnSOD and IDH2) and energy metabolism, thereby providing neuroprotection against oxidative stress and neurodegeneration.
To leverage SIRT3 for longevity and brain health, prioritize natural metabolic stressors like caloric restriction, fasting, or regular exercise. These activities naturally upregulate SIRT3, which in turn boosts your mitochondria's ability to handle stress and produce energy. Avoid relying on high-dose antioxidant supplements, as they may interfere with these natural adaptive benefits.
SIRT3 mediates the adaptation of increased energy demand during CR, fasting, and exercise to increased production of energy equivalents. SIRT3 deacetylates and activates mitochondrial enzymes involved in fatty acid β-oxidation, amino acid metabolism, the electron transport chain, and antioxidant defenses. As a result, the mitochondrial energy metabolism increases. In addition, SIRT3 prevents apoptosis by lowering reactive oxygen species and inhibiting components of the mitochondrial permeability transition pore.
Why this rating
The paper is a review citing multiple animal studies (mice, Drosophila) and human genetic data, but lacks direct human clinical trial data for neurodegeneration outcomes.
Source
Forever young: SIRT3 a shield against mitochondrial meltdown, aging, and neurodegeneration
Brad Kincaid et al. · Frontiers in Aging Neuroscience · 2013
DOI 10.3389/fnagi.2013.00048
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