April 2019 in “Journal of Investigative Dermatology” This study found that the gut microbiota in alopecia areata patients showed distinct dysbiosis, with an overrepresentation of Firmicutes and underrepresentation of Bacteroides, aligning with patterns seen in other autoimmune disorders.
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January 2019 in “Mediators of inflammation” This study concluded that Aloe vera fermentation significantly accelerates burn injury healing in rats by reducing inflammation and altering gut microbiota composition.
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January 2022 in “Advances in Dermatology and Allergology” This review discusses the relationship between gut microbiota and alopecia areata, and it does not report new clinical results.
May 2025 in “Lasers in Medical Science” In this study, 13 androgenetic alopecia patients receiving Er: Yag laser treatment showed a significant increase in Staphylococcus spp. three days post-treatment, suggesting the laser may help modulate scalp microbiota balance.
April 2024 in “Animal models and experimental medicine” The researchers reported that platelet-rich plasma treatment increased hair growth in androgenic alopecia patients, potentially by altering scalp microbiota composition, including increased Cutibacterium and decreased Staphylococcus and Lawsonella.