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 7 of 10 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 Spinach 1 cup spinach: 4.3 grams of fiber Previous Next Start Slideshow Healthy Eating TipsHealthy LivingFiberVegetables