TY - JOUR T1 - THe low-tryptophan diet in psoriasis AU - Caplan RM Y1 - 1969/01/27 N1 - 10.1001/jama.1969.03150170084026 JO - JAMA SP - 758 EP - 758 VL - 207 IS - 4 N2 - To the Editor:—  It seems unfortunate that the negative report by Drs. Petrozzi and Rosenbloom (205:345, 1968), "Low-Tryptophan Diet in Treatment of Psoriasis," did not actually include patients on a genuine low-tryptophan diet. "Turkey-Meat Diet in Treatment of Psoriasis" would have been more relevant. Their laboratory confirmation of the true tryptophan content of turkey meat, plus clinical reports, help consign to limbo the notion of therapeutic efficacy of turkey meat in psoriasis.Whether a true low-tryptophan diet would help is still unsettled. Carruthers (Med J Aust1:493, 1968) reported it highly useful in 12 patients, but the circumstances were uncontrolled. One outpatient of mine, who was willing to subject himself to a three-week trial of that diet, had no benefit. SN - 0098-7484 M3 - doi: 10.1001/jama.1969.03150170084026 UR - http://dx.doi.org/10.1001/jama.1969.03150170084026 ER -