Probiotics for Children's Eczema: What a 70-Participant Trial Actually Measured

Dr. Arsy Editorial Team · November 9, 2026

A 70-participant trial found a difference in average eczema scores, but not every medication outcome changed. The study tested a particular three-strain probiotic mixture against placebo in children and adolescents aged four to 17. Its findings belong to that mixture and trial—not to every probiotic sold for eczema. ^[4]

How the trial was designed

Researchers assigned 35 participants to each group in a randomized, double-blind study. The tested mixture contained specified strains of Bifidobacterium lactis, B. longum and Lactobacillus casei, given over 12 weeks. Researchers measured eczema severity and recorded topical corticosteroid use. ^[4]

At 12 weeks, the average SCORAD score was 13.52 in the probiotic group and 18.96 in the placebo group. The reported between-group difference was -5.43 points, with a 95% confidence interval of -10.65 to -0.21. A difference in average severity is not the same thing as the percentage of children cured, and the interval indicates uncertainty around the estimated effect. ^[4]

Read the steroid-use result carefully

For the comparison from baseline to the end of the study, the paper reported no significant difference between groups in the proportion of days using corticosteroids or the total amount used. A comparison covering weeks six to 12 did show a difference. Those are different time windows; the latter should not be described as proof that total steroid use was lower across the entire trial. ^[4]

The study also reported clinician-assessed improvement among 29 of 32 assessed participants in the probiotic group and 17 of 30 in the placebo group. Those denominators differ from the 35 allocated to each group, so both numbers belong in the story. The paper reported similar numbers of adverse events across groups, but a small, short trial cannot establish every long-term risk. ^[4]

How does this compare with other research?

Other pediatric trials tested single strains or different mixtures, often in younger children. Reviews pool nonidentical products and have reported varying estimates; they should not be read as a guarantee for the specific mixture in this trial. ^{[2][3][6][7][8][11][14][15]}

If a family is considering a supplement, ask the pediatric clinician about the exact preparation and the child's medical history. Do not change prescribed steroid directions or use supplements instead of a treatment plan without consulting the prescriber. ^[20]

Research beyond a single study

The references below include trials in different age groups, reviews of treatment and prevention, and clinical guidelines. A study of one bacterial strain, combination or age group cannot be assigned automatically to another. Clinical outcomes should be considered separately from laboratory markers, and pooled reviews may include some of the same individual studies. ^{[1][5][6][19][20]}

Care for dry, sensitive skin

Explore Dr. Arsy™ Hydration Recovery Moisturizer #003, 4 oz, a fragrance-free moisturizer for dry, sensitive and eczema-prone skin. These probiotic studies did not test #003 and do not show that it prevents or treats eczema. Ask a clinician before choosing a product for a baby.

Related reading

• Can Probiotics Prevent Baby Eczema? What 18 Trials Found
• LGG for Young Children With Eczema: Why Two Trials Reached Different Results
• Probiotics and Adult Eczema: Reading a Seven-Trial Review Without Overpromising
• A BLa80 Probiotic Trial and Baby Eczema: Why One Large Difference Needs Context
• Baby eczema prevention: comparing major moisturizer studies
• A skin-bacteria safety trial: what its outcome means

Research and clinical references

1. Infant-only probiotics and eczema prevention: 18-trial meta-analysis.
2. ProPAD: Lactobacillus rhamnosus GG in young children.
3. Earlier placebo-controlled infant trial of LGG.
4. Probiotic mixture in children and adolescents: randomized trial.
5. Probiotics for adult eczema: systematic review.
6. Pediatric probiotic treatment: 13-trial systematic review.
7. Pediatric probiotic treatment: meta-analysis.
8. Probiotic mixture in children and adolescents: six-month trial.
9. Multistrain probiotic in adults: placebo-controlled trial.
10. Probiotic supplement in adults: randomized controlled trial.
11. Probiotic supplement in preschool children: randomized trial.
12. Probiotics started in later infancy: prevention trial.
13. B. lactis BLa80 in high-risk young children: prevention trial.
14. Probiotic studies in children: umbrella review.
15. Comparative probiotic strains for pediatric eczema treatment.
16. Comparative probiotic strains for pediatric eczema prevention.
17. Probiotics for prevention in children: systematic review.
18. Prenatal and postnatal probiotic timing: systematic review.
19. AAD guideline: pediatric eczema primary prevention.
20. AAD guideline: pediatric eczema management.
21. AAD guideline: adult eczema topical management.

Educational information; not individual medical advice. Cited researchers and organizations do not endorse Dr. Arsy products.