In this narrative review, researchers synthesized current evidence on topical metformin's potential benefits for various skin conditions, citing primarily preclinical studies that highlight its anti-inflammatory, antioxidant, and regenerative properties, although clinical translation requires further rigorous trials.
December 2024 in “Health Science Reports” This review found that topical metformin shows potential as a treatment in dentistry for periodontitis and in dermatology for conditions like wound healing and acne, but results for melasma are inconsistent.
August 2025 in “World Academy of Sciences Journal” This scoping review revealed that topical metformin shows potential in dermatology, displaying anti-inflammatory, antioxidant, anti-photoaging, wound-healing, and antitumor properties, while also being effective for conditions like melasma and acne vulgaris; further clinical trials are needed to confirm its safety and efficacy for long-term human use.
August 2023 in “Medical Hypotheses” In this review, researchers discussed the anti-inflammatory and immunomodulatory properties of metformin and hypothesized that its topical application could benefit those with alopecia areata, given its effects on immune pathways, hair regrowth, and autoimmune disease management.
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February 2013 in “JEADV. Journal of the European Academy of Dermatology and Venereology/Journal of the European Academy of Dermatology and Venereology” This review examines evidence on metformin's use in treating various skin disorders and discusses associated cutaneous side-effects; it reports no new clinical results.
