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Glossary Gut-Skin Axis

The gut-skin axis refers to the bidirectional relationship between the gastrointestinal system and the skin, highlighting how gut health can influence skin conditions and vice versa. This connection is relevant to hair loss as imbalances in gut microbiota can lead to systemic inflammation and nutrient deficiencies, which may adversely affect hair growth and health. Key distinguishing characteristics include the role of probiotics, diet, and the immune system in maintaining both gut and skin health, suggesting that improving gut function may have beneficial effects on hair loss conditions.

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Research

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research Modulating the Gut–Skin Axis in Dermatological Diseases: Mechanisms and Clinical Applications of Probiotics, Prebiotics, Synbiotics, and Postbiotics

February 2026 in “International Journal of Clinical Dermatology”

This review found that microbiota-targeted interventions, particularly certain strains of probiotics, are associated with improvements in skin conditions, most notably in pediatric atopic dermatitis, but their efficacy varies across other dermatological diseases.

research Lactiplantibacillus plantarum ZJUIDS51 improves androgenic alopecia via gut-skin axis

February 2026 in “Food Research International”

Lactiplantibacillus plantarum ZJUIDS51 can help regrow hair and improve scalp health in androgenic alopecia.

research 1115 Interrogating the gut-skin axis for acne and sebaceous gland health – a case study of nicotinic acid

April 2023 in “Journal of Investigative Dermatology”

This study found that while nicotinic acid significantly inhibited human sebaceous organoid growth in vitro, the predicted skin concentrations from gut microbiome-derived levels were far below the effective dose, suggesting high oral doses would be necessary for therapeutic effects.

research Is there a ‘gut–brain–skin axis’?

185 citations , January 2010 in “Experimental Dermatology”

This study introduces the concept of a "gut–brain–skin axis" where ingesting a specific Lactobacillus strain in mice may reduce stress-induced skin inflammation and hair growth inhibition.

research Gut microbes and skin disease, gut-brain-skin axis: A review

3 citations , January 2017 in “Chinese Science Bulletin (Chinese Version)”

This review discusses the gut-brain-skin axis and its role in skin diseases, advocating for treatments that integrate gut microbiota, mental health, and dietary interventions, but reports no new clinical results.

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community Study: There is 70x Higher Unconjugated DHT in Feces Compared To Blood Levels in Young Adults - Gut Microbiota Manages DHT Recycling and Metabolism

in Research/Science 194 upvotes 1 year ago

Gut microbiota significantly influences androgen metabolism, impacting hair loss treatments like finasteride. Probiotics, dietary changes, and fecal microbiota transplants may help manage DHT levels and improve hair health.

community Bruteforcing alopecia or the new advent of science progress

22 upvotes 1 year ago

Combining therapies like scyllo-inositol, alpha-ketoglutarate, and autophagy-inducing supplements may enhance hair growth and prevent hair loss. Reporting individual results can accelerate progress in hair loss treatments.

community DHT Itch and Oily Scalp Explained (and how to fix it)

90 upvotes 3 months ago

Malassezia overgrowth can worsen oily scalp and inflammation, contributing to hair loss. Treatments include antifungal shampoos, C6/C8 MCT oil, low-dose isotretinoin, finasteride, and dutasteride.

community Is there a topical androgen receptor blocker so we don't have to fuck with the enzyme and destroy our allopregnanolone, but go and hit the end target straight?

in Treatment 44 upvotes 2 years ago

The conversation discusses topical androgen receptor blockers for hair loss, mentioning Clascoterone, Pyrilutamide, GT20029, and RU58841. Ketoconazole's effectiveness and application methods are also debated.

community Gut microbiome imbalances linked to scalp inflammation and hair follicle impact

in Technology 243 upvotes 4 months ago

Gut microbiome imbalances can cause scalp inflammation and affect hair follicles, potentially leading to hair loss. Treatments include finasteride, peptides like BPC-157, TB-500, KPV, and lifestyle changes such as diet and exercise.

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Noelle Skin
Nice, France

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