Skipping meals and eating one large monstrous meal per day is very bad for you. Eating one large meal leads to excess insulin secretion and the body reacts to insulin by trying to store as much of it as fat. See our previus chapters on digestion and insulin and blood sugar.
Further, starvation in between these large meals tells your body that you are starving. When the body detects huge swings between feast and famine, it decides to try and store as much as possible during times of plenty. That large meal leads to a ton of insulin secretion, a ton of storage, and that tired coma afterwards.
Eating meals that are primarily carbohydrates is even worse. Carbohydrates have a huge glycemic index and will elevate your blood sugar and insulin levels even more.
Eating 1500 calories in five evenly distributed meals of 300 calories throughout the day is much better than one or two large 750 calorie meals.
Further, every time you eat, your body ramps up metabolism. You want to keep your metabolism elevated. Fasting and starvation in between meals causes your body to turn down metabolism, which leads to weight gain and weight storage.
Eating small meals throughout the day prevents the feast or famine response, raises your metabolism, and keeps you burning calories as opposed to trying to store them.