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Fast and feel good?

Claims that fasting eases symptoms of autoimmune disease have been met with scepticism. But the idea receives some support from the finding that leptin, a hormone that controls body weight, also regulates autoimmunity.

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Correspondence to Vijay K. Kuchroo.

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Kuchroo, V., Nicholson, L. Fast and feel good?. Nature 422, 27–28 (2003).

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