Do probiotics help eczema? What 39 trials found, and what works better
Probably not. A Cochrane review of 39 randomised trials with 2,599 people found probiotics probably make little or no difference to the itch and symptoms people report. What has stronger evidence is less exciting but more powerful: a daily skin-care routine you actually keep, knowing and managing your triggers, and learning to manage eczema with support. In one trial of 992 families, structured eczema education cut severity scores far more than no education over a year.
Walk down any health-food aisle and you'll find probiotics promising "skin support", and plenty of people with eczema have a cupboard full of them. If you're one of them, you're not being silly: the idea makes sense on paper. Gut bacteria help train the immune system, and eczema involves an over-reactive immune response in the skin. So it's reasonable to ask whether changing your gut bacteria could calm your skin.
Researchers have tested exactly that, in dozens of trials. Here's what they found, how much weight you can put on it, and the diet and lifestyle changes that have much stronger evidence behind them.
What the research on probiotics found
The strongest kind of evidence summary is a systematic review that pools every good-quality trial on a question. For probiotics and eczema, that's the 2018 Cochrane review. It brought together 39 randomised controlled trials with 2,599 people, mostly children, comparing probiotics with no probiotic (usually a placebo).
| What was measured | Trials (people) | Result with probiotics | Certainty |
|---|---|---|---|
| Symptoms rated by patients or parents, like itch and lost sleep (0 to 20 scale) | 13 (754) | 0.44 points lower, which could be anything from 1.22 lower to 0.33 higher, so no clear difference | Moderate |
| Quality of life | 6 (552) | No difference | Low |
| Severity scored by a clinician (SCORAD, 0 to 103 scale) | 24 (1,596) | 3.91 points lower (between 1.96 and 5.86 lower) | Low |
| Side effects | 7 (402) | No clear difference | Low |
The one result that looks positive is the clinician-scored severity. But the review notes that the smallest change on that scale people can actually notice is estimated at about 8.7 points. A drop of 3.91 points is less than half of that, so even if it's real, you probably wouldn't feel it.
How robust are these studies?
A Cochrane review is a strong design: a systematic search, only randomised trials, and a formal grading of how much we can trust each result (called GRADE). But a review is only as good as the trials inside it, and the authors were honest about the weak spots:
- Risk of bias: most trials were judged at unclear risk of bias, six had high drop-out, and only nine were at low risk overall.
- The results disagreed a lot: the differences between trials were significant to extreme, and the authors couldn't explain them.
- Lots of different products: the trials used many different strains, doses and lengths of time, so no single product can be singled out.
- Age of the search: the searches ran to January 2017, so newer trials aren't included.
- Who was studied: most participants were children, so we know even less about adults.
"Low certainty" means further research could change the estimate. But look at which way the evidence points: the outcome people care about most, how their skin feels day to day, was graded moderate certainty, and it showed no clear benefit.
What about probiotics for babies?
That's a separate question: preventing eczema rather than improving it. The World Allergy Organization's 2015 guideline makes a conditional suggestion for probiotics in pregnancy, breastfeeding and babies at high risk of allergy, based on very low-quality evidence. It says nothing about clearing eczema that's already there.
What has stronger evidence for eczema
So where should your time, energy and money go instead? These everyday changes have far better support than a probiotic capsule.
| Change | What the research shows | Evidence |
|---|---|---|
| Learning to manage eczema, with support | In a German trial, 992 families of children and teenagers with moderate to severe eczema were randomly assigned to six weekly education sessions or none. A year later, severity scores had fallen much more in the education groups: in teenagers by 19.7 points compared with 5.2 points, and in 8 to 12-year-olds by 16.0 compared with 7.8. Parents also coped better. One caveat: the comparison group got no education at all, and 17% of families dropped out. | Strong |
| Moisturising every day, even when skin is clear | The NHS recommends emollients as often as possible, at least twice a day, and carrying on when your skin improves. The hard part isn't knowing this, it's doing it every single day. | UK guidance |
| Knowing and managing your triggers | The NHS lists soap, washing detergent, some fabrics, pets, pollen, house-dust mites, heat and stress as possible triggers. Everyone's mix is different, which is why tracking your own matters. | UK guidance |
| Eating a varied diet, without cutting foods out on a hunch | The NHS advises against changing your diet for eczema unless a doctor confirms a food allergy. Unnecessary restriction can cost you nutrients and enjoyment without helping your skin. | UK guidance |
Notice what the strongest result is about: not a product, but people understanding their eczema and practising the daily habits until they stick. That's exactly what good coaching does.
Knowing isn't the hard part. Doing it every day is.
Most people with eczema already know they should moisturise and avoid triggers. What gets in the way is real life: tiredness, busy mornings, stressful weeks and conflicting advice online. My coaching isn't the programme tested in that trial, but it's built on the same idea: understand your skin, then practise the habits with support until they're automatic. Here's how we'd do it together.
A skin routine that fits your day
We build your moisturising routine around habits you already have, like brushing your teeth or making a coffee, so it happens even on bad days.
Your personal trigger map
We track your flares alongside sleep, stress, food, weather and products for a few weeks, so you can see your own patterns instead of guessing.
Calmer stress, better sleep
Stress is a recognised trigger. We find small, realistic ways to bring it down that suit your life, not a 60-minute routine you'll drop in a week.
Food without fear
We make sure you're eating a varied, nourishing diet, and I'll help you avoid the expensive fads and unnecessary restriction that eczema often attracts.
My take
I've lived with psoriasis since 2019, so I know how tempting it is to reach for anything that promises clearer skin. Diet and lifestyle changes made a real difference for me. But the changes that helped were the steady, everyday ones, not a capsule.
That's the honest message here. Save your money on probiotics for eczema and put that energy into the basics, done consistently, with someone in your corner when life gets in the way. That's what I do with my clients, and it's why I love this work.
Frequently asked questions
Can probiotics cure eczema?
No. There's no good evidence that probiotics cure or clear eczema. A Cochrane review of 39 trials concluded that using probiotics to treat eczema is not evidence-based.
Which probiotic strain is best for eczema?
No strain has been clearly shown to work. The trials tested many different strains, doses and lengths of treatment, and results varied so much between them that no single product stands out.
What lifestyle changes help eczema?
The strongest evidence is for learning to manage eczema with support: in a trial of 992 families, structured education reduced severity far more than no education. Daily moisturising, even when skin is clear, and knowing your own triggers, including stress, are the everyday foundations.
Should I cut out foods to help my eczema?
Not without a confirmed food allergy. The NHS advises against changing your diet for eczema unless a doctor tells you to.
Sources
- Makrgeorgou A, Leonardi-Bee J, Bath-Hextall FJ, et al. Probiotics for treating eczema. Cochrane Database of Systematic Reviews 2018, Issue 11, CD006135. Read it
- Staab D, Diepgen TL, Fartasch M, et al. Age related, structured educational programmes for the management of atopic dermatitis in children and adolescents: multicentre, randomised controlled trial. BMJ 2006;332:933-938. Read it
- Fiocchi A, Pawankar R, Cuello-Garcia C, et al. World Allergy Organization-McMaster University Guidelines for Allergic Disease Prevention (GLAD-P): Probiotics. World Allergy Organization Journal 2015;8:4. Read it
- NHS. Atopic eczema: treatment (page last reviewed 6 September 2024). Read it
Follow @habitiahealth on Instagram for a new evidence check most days.
I'm Shivy, a certified Integrative Nutrition Health Coach (Institute for Integrative Nutrition, 2020). I have a degree in biology and a master's in environmental science, and I've lived with psoriasis since 2019. I read the research on food, sleep, stress and movement and turn it into small, realistic habits. More about me.
This article is education, not medical advice. Always follow the advice of your GP or medical team, and check with them before changing your diet or supplements.
