Popsugar Fitness Healthy Eating Tips Vegetables With the Most Fiber Not All Veggies Are Created Equal: 10 Best Sources of Fiber June 18, 2016 by Jenny Sugar View On One Page Photo 6 of 10 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 6 Sweet Potato 1 medium sweet potato: 3.7 grams of fiber Previous Next Start Slideshow Healthy Eating TipsHealthy LivingFiberVegetables