Gut Microbiota–Skin Axis in Melasma: Microbial Metabolites and Hormonal Crosstalk

Apr 1, 2026FEMS microbiology letters

Gut Bacteria, Their Chemicals, and Hormone Interactions in Melasma Skin Condition

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Abstract

Gut dysbiosis may contribute to melasma through microbial metabolites that influence estrogen signaling and cellular aging.

  • Microbial metabolites like short-chain fatty acids and exopolysaccharides affect inflammation and estrogen metabolism.
  • Dysbiosis alters immunometabolic pathways associated with the chronic skin condition melasma.
  • Beneficial gut bacteria produce substances that inhibit harmful signaling pathways and reduce factors that promote skin pigmentation.
  • Certain gut microbes enhance estrogen recycling and oxidative stress, which may worsen hyperpigmentation.
  • The gut microbiota may serve as potential biomarkers and therapeutic targets for managing melasma.

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Full Text

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