Digestion allows the absorption of nutrients and other substances that you ingest. When digestion is compromised, your body's balance suffers, as does your well-being.. The most common digestive problems are acid reflux, heartburn, diarrhea, and constipation. The best ways to have good digestion are: eat more fiber, drink lots of water, exercise, eat less fat, manage stress, sleep well, cut down on alcohol, and take the time to eat. If your body is having trouble digesting and digesting food, you may need supplements to help it.r.