What is Roughage? - QS Study
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Roughage: The fibres of grains, fruits and green leafy vegetables that are not digested are called roughage. Roughage, also known as fiber or bulk, is an indigestible compound that your body can’t absorb. The roughage of fruits and vegetables consists of nothing but the cell walls made of cellulose. Roughage is not digested. It remains unchanged after digestion. This unchanged part of fibres helps produce feces in humans.

Fruits and vegetables are not only high in fiber but also contain natural vitamins, minerals and nutrients. Among vegetables, dark leafy greens are generally the best sources of fiber. An artichoke contains approximately 10 grams of fiber, while 1 cup of cooked green peas offers slightly less. Among grains, whole-wheat pastas and barley pack the most fiber, offering 6 grams in each cooked cup.

Examples are: Whole Grains, Legumes, Nuts and Seeds etc.