4. Avocados: 2.1 g of soluble fiber per serving
Avocados are an excellent source of monounsaturated fats, potassium, vitamin E, fiber, and vitamin C.
One avocado contains 13.5 grams of fiber, and about 1.4 are soluble.
Compared to other common fiber sources, they contain lower amounts of antinutrient phytate and oxalate, which reduce mineral absorption.