Three hundred patients of the Swiss Rheumatoid Arthritis Patient Union were asked by questionnaire whether they had any adverse reaction from food. Of the 159 replies 52 gave a positive history. Thirty-five patients could be further evaluated. Six patients, who gave the mose typical history of allergy, were investigated clinically, with laboratory tests and technetium-scintigramme after food challenge. There was no sign of an immunologic reaction in any of the measured parameters. The other patients were interviewed a second time with an extensive allergological questionnaire. None of the food intolerances could be substantiated.