Microbiome Friendly

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Did the trial fail? — a man in his forties waits alone at a bus stop in cold early light
Akkermansia

The gut microbe that raised GLP‑1 — and missed its target

2026 Gut Microbes trial, 142 adults: heat-killed Akkermansia missed its main goal, insulin sensitivity — yet raised the body's own GLP‑1 after a glucose drink.

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Does sugar cause mouth cancer? — a woman on her balcony late at night, chewing, a glass of wine in her hand
Oral acetaldehyde

The carcinogen your own mouth makes out of ordinary sugar

Mouth microbes from cancer patients turned sugar and alcohol into acetaldehyde — a carcinogen ranked with tobacco. Plaque hid the rest until enzymes opened it.

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Is long covid from the gut? — a woman stops halfway through the laundry and sits on the edge of the bed
Flagellin

Long covid may be driven from the gut, not from the lungs

A 2026 study in Gut traces inflammation far from the gut to flagellin, the protein of the bacterial swimming tail, via TLR5, IL‑15 and arachidonic acid.

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Is a newborn gut airless? — a new mother sits back in the chair by the window at first light
Bacteroides fragilis

Air should kill a baby's first microbe. It breathes instead

A Cell study reports one membrane fat lets Bacteroides fragilis — a microbe air should kill — outlast the oxygen of a newborn gut, and tunes immune cells.

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Why her and not you? — a man waits on the bench of a launderette in flat late-morning light
Probiotic responders

Same capsule, opposite result: what makes a probiotic work

120 overweight adults, 12 weeks: heat-killed L. plantarum did nothing on average. Only the least varied guts lost weight. Why that is a lead, not proof.

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What actually causes bad breath? — a woman at her own front door breathes into a cupped hand
Volatile sulfur compounds

Bad breath isn’t dirt. It’s one bacterial gene doing its job

A 2026 lab-dish and rat study turned down the bacterial gene behind bad breath. Here is the mechanism, the numbers, and everything the study did not show.

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Is the pain really physical? — a woman stops in an office corridor, a forearm pressed across her middle
Irritable bowel

IBS pain is not in your head: enzymes poke the gut's nerves

Stool fluid from IBS patients made gut nerve networks fire far harder than fluid from healthy people, a 2026 Gut study found. What it shows — and does not.

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Who carries the vitamin there? — a woman slices carrots at her kitchen counter under an evening lamp
Vitamin A

Vitamin A doesn't reach your immune cells on its own

In mice, gut bacteria run a three-day relay that carries dietary vitamin A to immune cells. Cell Host & Microbe 2026 — and what it did not show.

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