The phrase "great source of dietary fiber" means that something is rich in a type of nutrient called fiber, which is beneficial for our digestion and overall health. Full definition
They are a great source of dietary fiber and the all - important antioxidants; and when it comes to vitamins and minerals, like potassium and magnesium, they are a great source of those as well. (shelovesbiscotti.com)
Lemons are full of vitamin C, a great source of dietary fiber, and rich in B - complex vitamins. (simple-nourished-living.com)
Pumpkin seeds are rich in magnesium, potassium, fiber, protein and zinc.Pumpkins are low in calories, but are a great source of dietary fiber, antioxidants, minerals and vitamins. (reciperebuild.com)