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Psoriasis is a chronic inflammatory skin disorder characterised by an overactive immune response, which leads to rapid skin cell turnover. It is influenced by a combination of genetic, immunological, and environmental factors, manifesting in various forms such as plaque, guttate, pustular, and erythrodermic psoriasis, each with distinct clinical features. Recent studies highlight the role of gut dysbiosis, an imbalance in gut microbiota, as a contributing factor to psoriasis exacerbation. Disruptions in the gut microbiome can influence immune responses and inflammatory pathways, potentially worsening the condition. Bifidobacterium infantis (B. infantis), a probiotic strain, has emerged as a potential therapeutic agent among the promising interventions. Research indicates that B. infantis may help restore microbiome balance, reduce systemic inflammation, and modulate immune responses in psoriasis patients. Specifically, B. infantis has been shown to decrease pro-inflammatory cytokines such as IL-17 and TNF-alpha, both of which are crucial drivers of psoriasis. Moreover,
B. infantis enhances gut barrier function, which may reduce systemic inflammation and improve skin lesions. Clinical studies have demonstrated improvements in the Psoriasis Area and Severity Index (PASI) scores, as well as enhancements in the quality of life for patients receiving B. infantis supplementation. These findings underscore the potential of probiotics as a novel adjunctive therapy for psoriasis management, either as a standalone treatment or in combination with conventional therapies. Further studies are needed to elucidate the precise mechanisms by which B. infantis modulates immune responses, determine optimal dosing regimens, and assess the potential benefits of combining probiotics with traditional psoriasis treatments. Such research could pave the way for more personalised, microbiome-based therapeutic approaches in psoriasis care.