High-fibre describes foods rich in dietary fibre — the indigestible plant carbohydrates (cellulose, hemicelluloses, pectins, resistant starch) that keep the digestive system working well. Whole grains, legumes, vegetables, fruit, nuts, and seeds are the natural sources; bran and fibre-enriched products top them up. Fibre adds bulk that speeds transit and softens stools, feeds beneficial gut bacteria that ferment it into nourishing short-chain fatty acids, and helps control blood sugar and cholesterol. Regulators typically let “high fibre” be claimed at 6 g per 100 g. Most Western diets fall well short of the recommended 25–30 g daily — the single most achievable dietary upgrade for colon health.