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 fibre, drink plenty of water, move around, eat less fat, manage stress, sleep well, cut down on alcohol and take time to eat. If your body can't process and digest food well, you may need supplements to help.