There is not enough nutrition in a burger a day to keep the average human being alive. Not to mention a serious lack of fluids. Probably the same. Depends on other foods and exercise consumed during the day.

With the flat of your hand, press on the top of the burger. Then pick it up with both hands, maintaining pressure to keep it squished. If this isn't enough, you can try (in this same configuration) taking a bite from the top half, then a bite from the bottom half.

Nutritionist Emily Field, explains that the protein in a burger keeps you full, while carbohydrates give you energy, and fat helps you absorb vitamins and minerals. So, if you eat two burgers, you're getting more amounts of these, which will keep you fuller for longer, and also stop you binging later in the day.