Fact of the day

Wednesday, 9 September 2026

Skin & Glow-upwell supported · human dataDiscovery of the day

In pooled results from five randomised trials covering 332 people with acne, Lactobacillus probiotics and postbiotics reduced lesion counts no better than placebo or benzoyl peroxide.

Study design
Meta-analysis
Journal
J Cosmet Dermatol
Evidence
well supported

What it shows: A fair verdict for now rather than a final one: results pooled from five trials in 332 people found no benefit over placebo or benzoyl peroxide. With numbers that small, a modest effect could still have been missed.Meta-analysis · J Cosmet Dermatol

Lactobacillus-Based Microbiome Therapy for Acne Vulgaris: A GRADE Systematic Review and Meta-Analysis of Randomized Controlled Trials. J Cosmet Dermatol 2026Read the study →

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