 Umwe mu bashakashatsi Prof John Cummings yabwiye BBC ati: Ivyemezo birarenze kandi abantu bari bakwiye guhindura bakamenya ico bakwiye gukora. Izo mfungugwa zigwiriyemwo fibre zari zisanzwe zizwi mu guhagarika kugumigwa mu nda constipation - ariko akamaro ku magara ni kanini kurusha ico. 