roughage

The effects of fibre were first discovered in the 1970s, when it was believed that fibre was just "hard roughage stuff" that helped our bodies get rid of waste, explains Whelan.

From BBC ● Jan. 16, 2026

Raw honey in its purest form would be the honeycomb which is edible and filled with natural vitamin A and also is a source of roughage.

From Salon ● Jun. 3, 2023

Therefore, the digestive system must be able to handle large amounts of roughage and break down the cellulose.

From Textbooks ● Jun. 9, 2022

Although this heap of roughage looks as if it should be taken for medicinal purposes only, the greens have lost their ferocious raw quality after being thoroughly kneaded with a Caesar-like dressing.

From New York Times ● Jan. 31, 2022

Only a few are especially valuable as fuel or as a source of protein, but almost all are high in mineral salts and can supply the "roughage" desirable in the diet.

From Food Guide for War Service at Home Prepared under the direction of the United States Food Administration in co-operation with the United States Department of Agriculture and the Bureau of Education, with a preface by Herbert Hoover by Florence Powdermaker