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This review explores the connection between the gut-skin axis and the development of dermatological conditions like atopic dermatitis, psoriasis, alopecia areata, and acne, and discusses the potential of probiotics in reshaping the microbiome to alleviate these skin issues.

This research identified unique gut microbiota patterns in alopecia areata patients, with potential as diagnostic biomarkers and suggesting avenues for microbiota-focused therapies.

This systematic review reported that probiotics, prebiotics, synbiotics, postbiotics, and dietary supplements may improve hair density and reduce dandruff severity in individuals with scalp disorders, potentially by modifying inflammation, oxidative stress, and microbiota composition; however, variability across studies limits the strength of these conclusions.

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.

This review reveals that PCOS is consistently linked to gut microbiota dysbiosis, characterized by reduced microbial diversity and shifts in composition, which are associated with various PCOS phenotypes and may present opportunities for microbiota-targeted therapies addressing the disorder's underlying pathophysiological mechanisms.