A new study in mice provides a potential mechanism for how probiotics can alleviate symptoms of Irritable Bowel Syndrome (IBS). Researchers first induced IBS-like conditions in mice using a fecal transplant, then treated them with a complex probiotic formula for 14 days. The probiotic treatment successfully reduced constipation, lowered gut inflammation, and strengthened the intestinal barrier. A key discovery was the probiotic's effect on the neurotransmitter serotonin. The treatment led to lower levels of serotonin in the gut tissue while simultaneously increasing the expression of the serotonin transporter (SERT), a protein that helps clear serotonin from the gut lining. This neurochemical rebalancing was linked to beneficial changes in the gut microbiome composition and a reduction in fecal tryptophan, the amino acid building block for serotonin.
Psoriasis, an autoimmune disease known for causing inflamed, scaly skin patches, may have its roots in the gut. A new scientific review synthesizes a growing body of evidence linking the condition to an imbalance in the gut microbiome, known as dysbiosis. The authors detail the potential mechanisms through which gut health can influence this skin disease. Key among these is the concept of a compromised intestinal barrier, or 'leaky gut,' which may allow inflammatory bacterial products to enter the bloodstream and trigger a system-wide immune response that manifests in the skin. The review also explores how byproducts created by different gut microbes can either promote or suppress inflammation, directly impacting the severity of psoriasis. The paper concludes that the gut microbiome should be considered a central regulatory hub in the development and progression of psoriasis.
A 16-week double-blind RCT of 120 overweight adults found that daily supplementation with pasteurized Akkermansia muciniphila significantly improved insulin sensitivity, reduced waist circumference by 2.3 cm, and restored gut barrier integrity markers compared to placebo. Fecal microbiome analysis showed increased overall microbial diversity in the treatment group.