Abstract
TWENTY-FIVE of 48 volunteers maintained a daily intake of potatoes approximating to 1kg for a minimum of 10 weeks and maximum of 20 weeks. The average consumption was 0.86kg, i.e. about 2Ibs, containing an estimated 4.26g crude fibre (C.F.). C.F. intakes, intestinal transit times, daily stool weights, colo-rectal pressures, total body weights, and blood lipid levels were measured before, during and after completion of the trial. In subjects initially consuming less than C.F. 5g daily there was a significant decrease in intestinal transit times and in colo-rectal pressures, and significant increase in stool weights. In subjects consuming more than C.F. 5g daily, favourable changes in all of these parameters were recorded but they only reached significant levels in increased stool weight. Blood lipid levels were not altered, and in spite of the high intake of potatoes, there was no increase in body weight.
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