You should avoid the following:
Sugar juices- They are high in sugars and increase the blood sugar, making you hungry and crave for more.
Carbonated drinks- These drinks cause damage of the mucous membranes, reducing the blood flow and decelerate digestion.
Tomatoes- Tomatoes must be avoided in the case of acid refluxes and ulcers, as they contain tannic acid and raise the body acidity.
Citrus fruits- These fruits cause an irritation of the stomach and esophagus.
Shortcrust pastry- Even though they are delicious, they contain yeast, which causes flatulence and upset stomach.
On the other hand, the following foods are perfect for a breakfast:
Buckwheat- It is high in proteins, iron, and vitamins, and thus it helps digestion. You can add it to pancakes, waffles, smoothies, and bars.
Wheat germ- It boosts digestion, and a couple of tablespoons provide 10% of the needed daily folic acid and 15% of the daily vitamin E.
Cornmeal porridge- It provides a feeling of satiety, detoxifies the body and maintains a balance of the microflora in the intestines.
Whole grains (no yeast)- They are rich in complex carbs, so you can freely add them to pancakes, waffles, and grain toasts.
Papaya- This fruit is a rich source of vitamin E, C, fiber, so it helps digestion. It is also high in papain, an enzyme which supports digestion and reduces the risk of colon cancer.
Eggs- They are extremely beneficial for the health, and provide a feeling of satiety.
Nuts- They are rich in proteins and healthy fats, and thus balance the Ph levels of the stomach, reduce the acids, and treat ulcers.
Blueberries- They are very low in calories, high in nutrients, improve memory, regulate blood pressure, and boost the metabolism. You can add them to your smoothies, pancakes, salads, and waffles.
Oatmeal- It prevents damage of hydrochloric acid, as it protects the coating in the belly lining. It is high in fibers, nutrients, and vitamins, and thus it regulates cholesterol levels and boosts the metabolism.