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Rheumatology 2001; 40: 1175-1179
© 2001 British Society for Rheumatology
Original Papers |
A vegan diet free of gluten improves the signs and symptoms of rheumatoid arthritis: the effects on arthritis correlate with a reduction in antibodies to food antigens
Department of Rheumatology, Karolinska Institutet at Huddinge University Hospital, Stockholm,
1 Department of Rheumatology, Karolinska Institutet at Karolinska Hospital, Stockholm,
2 The Unit for Preventive Nutrition, Karolinska Institutet at Novum, Huddinge, Sweden and
3 Department of Radiology, Surgical Hospital, Helsinki University Central Hospital, Helsinki, Finland
Objective. Whether food intake can modify the course of rheumatoid arthritis (RA) is an issue of continued scientific and public interest. However, data from controlled clinical trials are sparse. We thus decided to study the clinical effects of a vegan diet free of gluten in RA and to quantify the levels of antibodies to key food antigens not present in the vegan diet.
Methods. Sixty-six patients with active RA were randomized to either a vegan diet free of gluten (38 patients) or a well-balanced non-vegan diet (28 patients) for 1 yr. All patients were instructed and followed-up in the same manner. They were analysed at baseline and after 3, 6 and 12 months, according to the response criteria of the American College of Rheumatology (ACR). Furthermore, levels of antibodies against gliadin and ß-lactoglobulin were assessed and radiographs of the hands and feet were performed.
Results. Twenty-two patients in the vegan group and 25 patients in the non-vegan diet group completed 9 months or more on the diet regimens. Of these diet completers, 40.5% (nine patients) in the vegan group fulfilled the ACR20 improvement criteria compared with 4% (one patient) in the non-vegan group. Corresponding figures for the intention to treat populations were 34.3 and 3.8%, respectively. The immunoglobulin G (IgG) antibody levels against gliadin and ß-lactoglobulin decreased in the responder subgroup in the vegan diet-treated patients, but not in the other analysed groups. No retardation of radiological destruction was apparent in any of the groups.
Conclusion. The data provide evidence that dietary modification may be of clinical benefit for certain RA patients, and that this benefit may be related to a reduction in immunoreactivity to food antigens eliminated by the change in diet.
KEY WORDS: Rheumatoid arthritis, Vegan diet, ACR response, Food antigens.
Correspondence to: I. Hafström, Rheumatology Department, Huddinge University Hospital, 141 86 Stockholm, Sweden
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