Clinical experiments were carried out to determine whether varying the dietary protein would affect the course of psoriasis. A single patient was studied in great detail. While on a completely synthetic diet in which pure amino acids instead of protein served as the source of nitrogen, the patient showed marked improvement. An amino acid diet containing only 3.5 gm nitrogen produced more rapid improvement than an amino acid diet containing higher amounts of nitrogen. The psoriasis became worse when the patient was on a high protein steak diet.
LERNER MR, LERNER AB. Psoriasis and Protein Intake. Arch Dermatol. 1964;90(2):217–225. doi:10.1001/archderm.1964.01600020085021
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