Hormonal
Oleic acid stimulates complete fatty acid oxidation in skeletal muscle by activating the cAMP/PKA pathway, which phosphorylates and activates SIRT1, leading to PGC1α deacetylation and increased expression of fatty acid oxidation genes.
Consuming oleic acid (found in olive oil and other monounsaturated fats) may actively signal your muscles to burn fat more efficiently by activating specific cellular pathways (SIRT1/PGC1α). This is distinct from saturated fats, which do not trigger this specific oxidation-promoting signal. Prioritizing monounsaturated fats may support metabolic flexibility.
In skeletal muscle cells, oleic acid induces cAMP/PKA and SIRT1 Ser-434 phosphorylation and activity, causing PGC1α deacetylation and increased fatty acid oxidation.
Why this rating
The study uses rigorous in vitro and in vivo models with specific inhibitors and mutants to establish causality, though it is a single mechanistic study rather than a large clinical trial.
Source
Oleic Acid Stimulates Complete Oxidation of Fatty Acids through Protein Kinase A-dependent Activation of SIRT1-PGC1α Complex
Ji‐Hong Lim et al. · Journal of Biological Chemistry · 2013
DOI 10.1074/jbc.m112.415729
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