Cooking, germination, and fermentation change the chemical form of bioactive compounds in lentils, resulting in more peptides being released, the structure of resistant starch being altered, and...
Mechanism
Synthesis from 1 study
Cooking, germinating, or fermenting lentils breaks open their cells, freeing compounds that feed good gut bacteria and block inflammation. These bacteria make acids that seal the gut lining, while the freed plant compounds turn on protective systems in gut cells to reduce damage and keep the...
Most probable mechanism
When lentils are cooked, germinated, or fermented, their proteins break into smaller pieces, their starch changes shape to resist digestion, and their plant compounds shift from being stuck in fibers to becoming free-floating. These changes let gut bacteria feed more efficiently on the starch and peptides, producing beneficial acids that strengthen the gut lining. At the same time, the freed plant compounds directly block inflammation signals in gut cells and turn on protective antioxidant systems, reducing damage and improving barrier function.
Cooking, germination, or fermentation disrupts lentil cell walls and protein matrices, releasing bound peptides and polyphenols into bioavailable forms
Resistant starch undergoes structural changes such as gelatinization and recrystallization, increasing its resistance to small intestinal digestion and delivering it intact to the colon
Colonic microbiota ferment resistant starch into short-chain fatty acids (acetate, propionate, butyrate), which activate G protein-coupled receptors on intestinal epithelial cells
Short-chain fatty acids upregulate expression of tight junction proteins (ZO-1, claudin-2, E-cadherin), enhancing intestinal barrier integrity and reducing permeability
Released polyphenols and their microbial metabolites bind to TLR4 on intestinal epithelial cells, inhibiting downstream NF-κB and MAPK signaling pathways
Inhibition of NF-κB and MAPK signaling reduces transcription of pro-inflammatory cytokines (IL-6, IL-8, TNF-α), iNOS, and COX-2
Polyphenol metabolites dissociate Nrf2 from Keap1, enabling Nrf2 nuclear translocation and upregulation of antioxidant enzymes (HO-1, NQO-1)
Antioxidant enzymes neutralize reactive oxygen species, reducing oxidative stress and further suppressing inflammatory signaling
Resistant starch fermentation redirects microbial metabolism away from proteolytic pathways, suppressing production of harmful metabolites (ammonia, phenols) and enriching SCFA-producing taxa
Polyphenols and their metabolites selectively promote growth of phenolic-metabolizing bacteria (Bifidobacterium, Lactobacillus, Ruminococcus bromii) while inhibiting pro-inflammatory taxa (Bacteroides, Escherichia)
Evidence from Studies
Supporting (1)
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