The 2026 Global Delphi Consensus on Acne and the Microbiome: Questions People With Acne-Prone Skin Can Ask a Dermatologist

The 2026 global Delphi consensus says microbiome care belongs in acne management, and it gives people with acne-prone skin clear questions for a dermatologist. The microbiome means the community of microbes living on skin and in the gut. An international expert panel publishing in 2026 unanimously agreed that the microbiome is an important contributor to acne and that microbiome-targeted treatments should be adopted for acne management, according to the MDPI Pharmaceuticals consensus. Readers can use that agreement to ask practical, personalized questions rather than seek a one-size product.

Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.

What did the experts agree on?
Is acne caused by too many germs?
What should you ask about routine, diet, and surroundings?
How do biotics fit with proven treatment?
What are the limits of this consensus?

What did the experts agree on?

The panel reached 100% agreement that the microbiome contributes to acne development and deserves a place in treatment planning. In the first e-survey, 89% also agreed that the microbiome influences severity, the gut-skin axis affects the acne microbiome, and prebiotics, probiotics, and postbiotics belong in therapy, according to the MDPI Pharmaceuticals consensus.

Those terms describe different supports. Prebiotics feed beneficial microbes, probiotics add live beneficial microbes, and postbiotics use helpful microbial products. The vote signals expert support for asking about them as adjuncts, not replacements for proven care.

Is acne caused by too many germs?

Acne dysbiosis reflects loss of Cutibacterium acnes phylotype diversity and imbalance with Staphylococcus epidermidis, according to an MDPI Microorganisms review. The problem disrupts barrier function, pH, immune cooperation, and oil balance.

That distinction matters for treatment choices. A harsh routine aimed at sterilizing skin can irritate barrier and pH without restoring balance. Ask the dermatologist how the plan protects diversity while controlling breakouts.

What should you ask about routine, diet, and surroundings?

The panel agreed at 75% or higher that skincare can alter the acne microbiome and that diet, lifestyle, climate, and pollution directly affect it. Those factors are grouped under the exposome, meaning total everyday exposures.

Use the visit to connect habits to flares. Bring a short list of cleansers, moisturizers, sunscreens, makeup, shaving or masking habits, sleep changes, and recent travel or pollution exposure.

Which products in my routine may disturb barrier, pH, or microbes?
Do any foods, stress patterns, or climate and pollution exposures look like triggers for me?
What simple swap or sun and pollution step should I try first?

How do biotics fit with proven treatment?

People with acne-prone skin can ask whether a prebiotic, probiotic, or postbiotic is an appropriate adjunct to proven benzoyl peroxide, retinoid, or combination therapy, with clear benefit and follow-up. Also ask how the plan preserves barrier and limits resistance.

Antibiotic stewardship is part of that discussion. The American Academy of Dermatology advises avoiding antibiotic monotherapy, co-using benzoyl peroxide to curb resistance, and limiting systemic antibiotics to the shortest course, typically 3-4 months, according to the AAD 2024 guidelines summary. Ask when antibiotics start, what they pair with, and when they stop.

What are the limits of this consensus?

This Delphi reflects expert opinion, not proof that a specific biotic product clears acne. The American Academy of Dermatology 2024 acne guidelines found evidence gaps on microbiology testing, complementary therapies, and diet and made no specific diet or biotic recommendation.

Treat biotics as a question, not a promise. Ask what outcome to expect, how long to test it, what side effects to watch for, and when to return if acne worsens, scars, or affects mood.