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  • Title: A Review of Indigo Naturalis as an Alternative Treatment for Nail Psoriasis.
    Author: McDermott L, Madan R, Rupani R, Siegel D.
    Journal: J Drugs Dermatol; 2016 Mar; 15(3):319-23. PubMed ID: 26954317.
    Abstract:
    INTRODUCTION: Nail psoriasis is challenging to treat. The few currently available therapies are limited in efficacy, and often produce unfavorable side effects. A plant extract widely used in Traditional Chinese Medicine, indigo naturalis (Qing Dai), is presented in this review as an alternative topical treatment for skin and nail psoriasis. The purpose of this article is to present information on a viable alternative treatment with a favorable side effect profile for a difficult disease to treat. METHODS: A PubMed search for the term "indigo naturalis" was performed, and literature from 2006 to the present relevant to indigo naturalis and treatment of psoriasis and nail psoriasis was reviewed. RESULTS: Indigo naturalis shares several therapeutic mechanisms with current psoriasis treatments, such as regulation of keratinocyte proliferation and differentiation, restoration of epidermal barrier function, and reduction of inflammatory processes. Clinically, it is well tolerated. CONCLUSION: Recent research of indigo naturalis suggests that it is a safe, inexpensive, and effective alternative topical treatment for skin and nail psoriasis.
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