Good food is essential to good health. For those striving to be healthier a food journal can help them progress in their journey. 1. They can be a great way to determine food allergies. 2. Food journals can help people understand if their body type requires more fats or carbohydrates. 3. Food journals document the emotional and mental reactions after eating certain types of food. 4. They can help people determine whether they are eating out of hunger or boredom. 5. People can better portion the right amounts of good food and eliminate the bad food.