Hormonal
Saturated fatty acids (SFAs) activate Toll-like receptor 4 (TLR4) in skeletal muscle and adipose tissue, triggering IKK and JNK kinases that phosphorylate IRS proteins on serine residues, thereby blocking insulin signaling and causing insulin resistance.
If you have insulin resistance or obesity, the type of fat you eat matters significantly. High intake of saturated fats (found in fatty meats, butter, cheese) can directly activate immune receptors in your muscle and fat cells, triggering inflammation that blocks insulin from working. Reducing saturated fat intake may help restore insulin sensitivity by lowering this specific inflammatory signaling.
It has been demonstrated that fatty acids, specially saturated fatty acids, are able to activate TLR-4 in skeletal muscle cells, resulting in increased activity of IKK and JNK... Both JNK and IKKβ have been proposed to be the mediators of insulin resistance induced by saturated fatty acids... It has been shown that these kinases phosphorylate serine residues on IRS proteins, blocking IRS phosphorylation on tyrosine residues by the activated insulin receptor and consequently inhibiting insulin effects.
Why this rating
The paper cites multiple animal models (knockout mice) and human studies showing elevated TLR expression in diabetes, but notes that clinical trials for neutralizing cytokines have been mixed.
Source
Molecular Targets Related to Inflammation and Insulin Resistance and Potential Interventions
Sandro Massao Hirabara et al. · Journal of Biomedicine and Biotechnology · 2012
DOI 10.1155/2012/379024
More from this paper
- Anti-TNF-alpha therapies (e.g., infliximab) fail to improve insulin sensitivity in type 2 diabetes patients, whereas they successfully reduce insulin resistance in patients with high-grade inflammatory diseases like rheumatoid arthritis.Strong
- Activation of G-protein coupled receptor 120 (GPR120) by n-3 fatty acids (DHA, alpha-linolenic acid) attenuates the production of pro-inflammatory cytokines (TNF-alpha, IL-6, MCP-1) and prevents obesity-induced glucose intolerance and insulin resistance.Good
Related findings · Hormonal
- Initial treatment for type 2 diabetes should be a combination of metformin and either an SGLT-2 inhibitor or a GLP-1 receptor agonist to achieve cardiorenal protection, rather than monotherapy or older agents like sulfonylureas.Strong
- For patients with specific monogenic obesity syndromes (leptin deficiency, POMC/PCSK1/LEPR mutations), targeted pharmacotherapy (recombinant leptin or setmelanotide) is highly effective and should be prioritized, unlike in polygenic obesity.Strong
- Continued weekly administration of 2.4 mg subcutaneous semaglutide prevents weight regain and promotes further weight loss in adults with overweight or obesity, whereas switching to placebo results in significant weight regain.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →