Stanford-trained gastroenterologist Saurabh Sethi has shared 10 high-fibre foods that are not vegetables. The list includes chia seeds, flax seeds, lentils, chickpeas, raspberries, blackberries, pear with skin, oats, quinoa and black beans. Dietary fibre is essential for digestive health, blood sugar regulation, constipation prevention, cholesterol reduction and lowering risk of chronic diseases.