Nutrition, microbiome & skin

The microbiome & skin

The role of the gut and skin microbiome in skin health.

9 resources

Patient guides

Probiotics and skin health

Probiotics can help to modulate the gut microbiota and the immune system. Some strains show benefits as a complement in certain skin diseases, although there is no universal probiotic and scientific evidence continues to evolve.

July 23, 2026

Gut microbiota and skin health

The gut microbiota influences the immune system and participates in the communication between the gut and the skin. A balanced diet and a healthy lifestyle favour a diverse microbiota, although skin diseases are multifactorial and require an individualised medical approach.

July 23, 2026

Scientific news

Atopic dermatitis: skin barrier, microbiome and new treatments

Atopic dermatitis is now understood through three mechanisms: a fragile skin barrier (filaggrin), a disrupted microbiome (Staphylococcus aureus) and type-2 inflammation (IL-4, IL-13, IL-31). This understanding has enabled targeted treatments — dupilumab, tralokinumab, lebrikizumab, nemolizumab and JAK inhibitors — that transform the outlook for moderate-to-severe disease.

August 1, 2026

Helicobacter pylori: the bacterium behind most ulcers… and sometimes stomach cancer

Helicobacter pylori is the most common chronic bacterium in humans (≈ 15–20 % in France, > 60 % in some regions of the world). Often asymptomatic, it causes chronic gastritis that can lead to a gastric ulcer (70 %), a duodenal ulcer (> 90 %) or, more rarely, stomach cancer (classified a definite carcinogen by the IARC). Diagnosis by urea breath test or stool antigen; PCR on biopsies to guide antibiotics. Treatment: PPI + antibiotics (± bismuth) for 14 days, with mandatory eradication check. Key issues: antibiotic resistance and targeted screening. Sources: Maastricht VI, HAS, IARC.

July 21, 2026

Antioxidants: essential to protect our cells, but not miracle molecules

Antioxidants protect our cells from oxidative stress, but their benefits come above all from a varied, plant-rich, minimally processed diet — not from high-dose supplements, which can sometimes be counterproductive. With antioxidants, diversity beats isolated molecules.

July 15, 2026

Why is the gut microbiome so important for our health?

The gut microbiome, a genuine functional organ, influences digestion, immunity, metabolism and inflammation. The best current evidence supports a varied, plant-rich, minimally processed diet far more than microbiome tests or ultra-personalised nutrition.

July 1, 2026

Frequently asked questions

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