Vox Rationis - 

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1971

During the 1960s and 1970s dietary advice began to focus on the risks related to low fibre diet. Concerns that the populations of industrialised nations suffered more from constipation, diverticulitis and bowel cancer than those in the developing world where the dietary intake of fibre was higher. In 1971, cited by Southgate as the start of the dietary fibre hypothesis, Dennis Burkitt concludes that fibre in the diet has a protective effe

Southgate, D.A.T. (1992) The dietary fibre hypothesis: A historical perspective. In Dietary fibre – a component of food. (Eds) Schweizer, T.F. & Edwards, C.A. Springer-Verlag.