The majority of meals that aid digestion are high in nutrients such as fiber. Vegetables and whole grains are examples of fiber-rich diets. Some persons who are prone to digestive disorders may benefit from eating smaller meals, as well as getting enough fiber and avoiding trigger foods. Fiber's main role is to move through your digestive system undigested, which prevents constipation and irritable bowel syndrome (IBS) symptoms. It also increases the time it takes for you to eat your meal which can't be a bad thing! Fiber has other health benefits as well including reducing your risk of developing kidney stones, diabetes, and heart disease. Foods that are high in protein will also help with digestion because the body uses proteins to create enzymes that help break down food into nutrients that can be used by the body. Proteins are also important for building strong stomach acid which helps digest the food that does make it into your stomach. Vitamins play an important role in helping the body use the nutrients it consumes. A vitamin deficiency can cause some digestive problems such as diarrhea, nausea, and abdominal pain. However, having too many vitamins can also be problematic if you're not properly absorbing the nutrients from your food. Too much vitamin C, for example, can lead to the formation of calcium deposits in your joints and kidneys; likewise, too much iron can cause nerve damage.