Best Fiber Sources per Calorie

Top fiber-rich foods ranked by fiber density. Adequate fiber (28g/day) reduces colon cancer risk, improves gut microbiome diversit

Top 5 — Ranked by fiber_efficiency

RankFoodMetricWhy
#1Chia Seeds14.2 cal/g fiber486 cal, 34.4g fiber per 100g. Also omega-3 (17.8g). Absorbs 10x weight in water → extreme satiety.
#2Raspberries8 cal/g fiber52 cal, 6.5g fiber per 100g. One of the highest-fiber fruits. Also vitamin C and ellagitannins.
#3Black Beans15.2 cal/g fiber132 cal, 8.7g fiber per 100g. Also 8.9g protein. Resistant starch for gut health.
#4Oats36.7 cal/g fiber389 cal, 10.6g fiber per 100g. Beta-glucan specifically — lowers cholesterol and improves glycemic response.
#5Lentils14.7 cal/g fiber116 cal, 7.9g fiber per 100g. Also 9g protein. The ultimate fiber + protein package.