Lucy from the gorgeous city of Salem Oregon would like to know how much dietary fiber is in freshly made carrot juice? One cup of fresh homemade carrot juice contains roughly 2 grams of dietary fiber. Carrot juice, like many other freshly made juices does not contain a large amount of fiber, thus it's always important to eat fruits and veggies in addition to juicing them. If you want to up the fiber level in your carrot juice, you can make a rolled oats and yogurt smoothie with it, which tastes delicious. You can also stir into the juice one to two tablespoons of your favorite dietary fiber supplement, such as Metamucil or other well known brands. You can also take the leftover carrot pulp from your juicer and place it into your food dehydrator for fiber rich carrot crackers. The more research that is done on the effects of dietary fiber on the human body, the more researches conclude that it's essential in keeping the body healthy. So get lots of fiber in your diet.