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Article
December 1969

Zinc Therapy and Distribution in Psoriasis

Author Affiliations

Ann Arbor, Mich

From the Department of Dermatology, the University of Michigan Medical Center, Ann Arbor, Mich. Dr. Voorhees is a Carl Herzog Fellow of the American Dermatological Association. Dr. Miedler is currently in private practice in Toledo, Ohio.

Arch Dermatol. 1969;100(6):669-673. doi:10.1001/archderm.1969.01610300019002
Abstract

Possible low plasma zinc in psoriasis and the similarity of psoriasis to zinc deficiency dermatosis in animals prompted this study. Using a double-blind, cross-over design we treated 19 psoriatic outpatients with 220 mg zinc sulfate or placebo three times daily for two months. No statistically significant improvement was detected in treated patients.

Seven psoriatic inpatients had scale zinc higher than keratin zinc in five controls, whereas four patients had serum zinc lower than 12 controls. These four with low serum zinc also failed to improve on zinc therapy, although psoriatic scale zinc increased and serum zinc surpassed that of controls. These findings militate against gastrointestinal malabsorption or faulty cutaneous entry of therapeutic zinc in psoriasis. Although subcellular zinc metabolism might be abnormal in psoriasis, systemic zinc deficiency is probably not the basic error.

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