In a group of 82 adults with metabolic syndrome risk, eating black beans every day lowered fasting blood glucose levels significantly, and this change was linked to an increase in gut bacteria that...
Mechanism
Synthesis from 1 study
Black beans feed good gut bacteria that make butyrate. Butyrate fixes the gut lining and stops inflammation from spreading. With less inflammation, the body uses insulin better, so blood sugar goes down.
Most probable mechanism
Eating black beans feeds good bacteria in the gut that make butyrate. Butyrate repairs the gut lining and stops inflammation from spreading through the body. With less inflammation, the body's cells respond better to insulin, so blood sugar drops.
Dietary fibers and polyphenols from black beans serve as fermentable substrates for specific gut microbial guilds
These microbial guilds ferment the substrates to produce butyrate as a primary short-chain fatty acid
Butyrate enhances intestinal epithelial integrity by promoting tight junction formation and reducing permeability
Butyrate inhibits histone deacetylases and activates G-protein-coupled receptors, suppressing NF-κB signaling and reducing systemic production of pro-inflammatory cytokines
Reduced systemic inflammation improves insulin receptor signaling in skeletal muscle and adipose tissue, lowering insulin resistance
Improved insulin sensitivity increases glucose uptake by peripheral tissues, resulting in lower fasting plasma glucose
Evidence from Studies
Supporting (1)
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