A meta-analysis of 87 randomized trials found a whole-grain "sweet spot" of 60 to 100 grams a day tied to the biggest drops in weight, cholesterol, blood pressure and inflammation markers.
An 8-year cohort study of nearly 13,000 Brazilian adults found the heaviest users of six common sweeteners had a 62% faster rate of cognitive decline than the lightest users, an effect strongest in adults under 60 and people with diabetes.
A retrospective study of 124 patients with advanced colorectal cancer found that those with an unbalanced gut microbiome had more than double the risk of death and a lower chemotherapy response rate than patients with typical gut bacteria, even after adjusting for age, tumor markers and treatment regimen.
Deleting IL-22 binding protein nearly doubled sepsis mortality in mice, 85% versus 40%, and a co-housing experiment tied the gap to the gut microbiome, not the gene alone. Mouse-only findings, from a published abstract.
A new multiomics study compared regular exercisers to sedentary adults and found distinct chromatin, gene-activity, and gut-bacteria-linked metabolite signatures in blood, including higher indoleacrylic acid and lower secondary bile acids in exercisers, though the cross-sectional design cannot prove exercise caused the differences.
In a rat model, the probiotic Clostridium butyricum reduced calcium oxalate crystal deposits and kidney injury, apparently by lowering a gut bile acid called GHDCA. Stone patients also had less of the bacterium in their stool. It is early, animal-based work, not a reason to buy a supplement.
A meta-analysis pooling 12 clinical trials and 633 patients with metabolic syndrome finds probiotic supplements modestly lower LDL cholesterol and raise HDL cholesterol, but the benefit is strongest in patients under 50 and several key markers (overall HDL, triglycerides, glucose, total cholesterol) showed only marginal or inconsistent effects.
A meta-analysis of 1,095 gut biopsies describes ulcerative colitis as two layers: a mitochondrial energy collapse that tracks with inflammation, and weaker, less certain changes that persist in uninflamed tissue. No gut microbes were measured.
In two long-running US cohorts, people who drank at least one sugar-sweetened beverage a day had about 2.5 times the risk of stomach cancer. Artificially sweetened drinks showed no link. Here is what the research letter found, what the H. pylori data add, and why it cannot prove cause.
Pooling 32 studies and 1,710 patients, researchers found fecal microbiota transplants meaningfully improved chronic constipation, but the underlying trials were shaky enough that the study authors themselves call the evidence very low confidence.
