The Gut-Skin Connection: What Is Known and What Isn't
Does gut health affect your skin?
A real research area, but early: no proven gut diet for clearer skin
Possibly, but it is early. Reviews describe gut bacteria influencing immune signals that reach the skin, and some probiotic trials show benefit for acne and eczema. There is no proven gut-health diet for clearer skin yet.
The idea
The gut is home to a large community of bacteria. Reviews of the gut-skin axis describe how this community may shape immune responses that show up in the skin. These reviews describe mechanisms and possibilities; they are not tests of a diet, so they suggest a link without proving a fix.
What probiotic trials found
A 2025 meta-analysis of nine randomised trials found that oral probiotics reduced acne severity and lesion counts at 12 weeks, with no major side effects reported. A meta-analysis in adults with eczema found improvement that depended on the strain, with no clear gain in quality of life. See our probiotics page for detail.
What you can do
There is no tested gut diet for skin. Fibre-rich plant foods are good for you anyway, so beans, lentils, wholegrains and a wide mix of vegetables are a reasonable place to start. That is general advice, not a claim that they will change your skin.
Your gut and your skin
Researchers are studying links between gut bacteria and skin, but it is early: there is no proven gut diet for clearer skin yet. Fibre-rich foods are good for you either way.
- Beans, lentils and wholegrains
- A wide mix of vegetables
What trials found about supplements
This reports study results only. It does not suggest taking anything or an amount, because the right choice depends on you. Talk to a doctor or pharmacist first, especially if you are pregnant or take other medicines.
Probiotics
Some evidenceOral probiotics reduced acne severity and lesion counts at 12 weeks in a meta-analysis of nine randomised trials, and some strains helped adults with eczema. Products and strains differed between trials, so we cannot name one that works.
Questions people ask
We cannot say. The research links gut and skin, but no study shows that a particular gut diet clears acne. Probiotic trials are the closest, and their results are modest.
Research
Selected studies and reviews on the gut-skin connection: what is known and what isn't. Each link opens the abstract on PubMed. This is background reading, not a substitute for advice from a dermatologist.
- The Gut Microbiome as a Major Regulator of the Gut-Skin Axis.Salem I et al. Front Microbiol, 2018 · PMID 30042740Note: Review of the gut-skin axis.
- The Role of Probiotics in Skin Health and Related Gut-Skin Axis: A Review.Gao T et al. Nutrients, 2023 · PMID 37513540Note: Review of probiotics and the gut-skin axis.
- Efficacy of oral probiotics in patients with acne: a systematic review and meta-analysis of randomized trials.Lin HW, Tam KW, Huang YC Clin Exp Dermatol, 2025 · PMID 40832719Note: Meta-analysis of 9 randomised trials.
- Effects of probiotic supplementation in adult with atopic dermatitis: a systematic review with meta-analysis.Husein-ElAhmed H, Steinhoff M Clin Exp Dermatol, 2023 · PMID 37706436Note: Meta-analysis in adults with atopic dermatitis.
General information, not dietary or medical advice. These guides describe what studies found and how strong the evidence is. Talk to a doctor or dietitian if you have a condition, are pregnant or are changing your diet or supplements.