Sweet Pumpkin is an extremely nutrient dense food, meaning it is chock-full of vitamins and minerals but low on calories. There are many creative ways pumpkin can be incorporated into your diet, including desserts, soups, salads, preserves and even as a substitute for butter. Sweet Pumpkin is a rich source of vitamin A. Sweet Pumpkin is one of the best-known sources of the antioxidant beta-carotene. Pumpkin puree or canned pumpkin can be used as a replacement for butter or oil in baking recipes.