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Fiber, Calcium Not Protective


Fiber and calcium supplementation, thought to aid in prevention of colorectal adenocarcinoma, has now failed in several trials to exert a significant effect. In fact, increased fiber consumption may actually be linked to increased recurrence of the neoplasm, especially in patients with high dietary calcium intake.


Bonithon-Kopp C et al. Calcium and fibre supplementation in prevention of colorectal adenoma recurrence: a randomised intervention trial. Lancet. 2000;356:1300–6.

Levin B. Dietary intake and recurrence of colorectal adenoma [editorial]. Lancet. 2000;356:1286–7.