Certain gut bacteria may protect against or increase the risk of hair loss.
73 citations
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April 2019 in “Experimental Dermatology” The scalp's microorganisms significantly affect hair health and disease.
1 citations
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January 2015 in “MOspace Institutional Repository (University of Missouri)” Probiotics improve soil quality and plant root growth but not auxin content.
April 2026 in “Zenodo (CERN European Organization for Nuclear Research)” Microbes in the small intestine may cause Post-Finasteride Syndrome symptoms.
February 2026 in “Middle European Scientific Bulletin” Improving scalp microbiome may help restore hair and improve scalp health.
April 2026 in “Open MIND” Microbes in the small intestine may cause Post-Finasteride Syndrome symptoms.
April 2019 in “Journal of Investigative Dermatology” Gut microbiota influences the development of alopecia areata.
192 citations
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March 2017 in “Cell host & microbe” Hair follicle development and microbes help regulatory T cells gather in newborn skin.
September 2021 in “Physiology News” The document concludes that more inclusive research involving the transgender community is needed, especially on the neovaginal microbiome of trans women.
March 2017 in “Zenodo (CERN European Organization for Nuclear Research)” L. plantarum MTCC 1325 may help improve memory and cognitive functions in Alzheimer's.
3 citations
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January 2018 in “Journal of probiotics & health” November 2025 in “Probiotics and Antimicrobial Proteins” July 2025 in “Journal of Investigative Dermatology” Probiotics significantly reduce the severity of atopic dermatitis.
13 citations
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January 2022 in “Advances in Dermatology and Allergology” Alopecia areata may be linked to imbalanced gut bacteria.
July 2023 in “Research Square (Research Square)” Certain gut bacteria may protect against alopecia areata, while others may increase the risk.
December 2025 in “International Journal of Clinical Medical Research” Diet and gut health can improve skin, hair, and nails.
4 citations
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July 2024 in “Skin Research and Technology” Certain bacteria may influence alopecia areata risk, but skin bacteria don't mediate gut-skin effects.
4 citations
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March 2022 in “BioEssays” Hydra can help understand human hair follicle microbiomes and develop new skin disease therapies.
9 citations
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July 2021 in “Journal of Medicinal Food” Lactobacillus paracasei HY7015 helps hair grow in mice.
June 2020 in “Zenodo (CERN European Organization for Nuclear Research)” Controlled microflora in animals delays immune cell maturation and affects immunity.
37 citations
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February 2023 in “Gut Microbes” Gut bacteria can lower androgen levels in male mice.
5 citations
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June 2024 in “Cureus” PCOS is linked to changes in vaginal bacteria, with fewer good bacteria and more harmful ones.
February 2026 in “Probiotics and Antimicrobial Proteins” Modifying gut bacteria with pro- and postbiotics may help treat hair loss.
5 citations
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August 2013 in “Integrative Zoology” Feathers in diet increase gut bacteria diversity in Arctic foxes.
2 citations
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January 2018 in “Elsevier eBooks” Probiotics and dietary changes can help treat acne.
1 citations
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October 2025 in “EBioMedicine” Women have a higher DHT/testosterone ratio than men, possibly due to gut bacteria activity.
Thermal spring waters and their microbes could be good for skin health and treating some skin conditions in skincare products.
195 citations
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December 2009 in “Journal of Investigative Dermatology” Free fatty acids in sebum boost skin's defense against acne by increasing antimicrobial peptides.
1 citations
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November 2009 December 2025 in “Cosmetics” Gut bacteria differences could help diagnose and treat alopecia areata.