ABSTRACT
The amount of fiber needed to achieve the CFW appears to be in the range of 35 to 45 g/d, as long as enough cereal fiber is included (probably 60 to 70%), especially wheat-type fiber. Wheattype fibers are high in water-insoluble fractions. The question of how much of the water-soluble fibers we need in relation to their effect on lipid and carbohydrate metabolism has not yet been answered, but it is certainly logical to assume that a fraction of the fiber should be of the watersoluble type, perhaps 30 to 40%. Pharmacological uses of dietary fiber and their effective levels are not part of these considerations. It also appears that other substances present in plant foods, such as tartaric acid in grapes and raisins, may decrease the amount of fiber needed to achieve a desirable TT.
