An Update on Clinically Evaluated Medicinal Plants for Psoriasis Management

Psoriasis is a prevalent inflammatory disease affecting almost 0.5-5% of the world population. Multiple treatment approaches have been developed to manage psoriasis so far. Although concerns exist in the long-term usage of conventional and biological agents in terms of safety, effectiveness, expensiveness, and tolerability, complementary and alternative medicine (CAM) is a promising point of view for future psoriasis management. In this study, databases including Scopus, PubMed, Google Scholar, and Web of Science were searched for relevant literature on herbal medications clinically evaluated for psoriasis, especially those originating from traditional medicine. About 40 relevant papers were selected by March 2023. Most of the studies were clinical trials on poly-herbal formulations from traditional Chinese medicine (TCM). There are controversial results regarding the efficacy of these herbal formulations in psoriasis mainly due to the variation in the study design. Moreover, the probable protective mechanisms and responsible herbal metabolites of these formulations are summarized. There is a global need for more in-vitro and in-vivo studies based on the standard protocols in terms of the evaluation of the safety and efficacy of topical/ systemic herbal preparations for psoriasis.