Fructosuria, intestinal as well as hereditary fructose intolerance therapy
Dietary treatment consists of a fructose-free or low-fructose diet, depending on fructose sensitivity. With strict adherence to the diet, symptoms usually improve within a few weeks. It is important to know that by adding glucose to a high-fructose diet, fructose absorption can be largely normalized. The reason for this is apparently the simultaneous presence of glucose and fructose in many types of fruit. The glucose content can compensate for the reduced ability of fructose absorption.
Occurrence of fructose
- Occurrence of fructose in free form.
- Household sugar (sucrose) is a disaccharide (two-sugar). Sucrose consists as a dimer of one molecule each α-D-glucose and β-D-fructose.
- Honey mixture of fructose and glucose.
- Invert sugar mixture of equal parts glucose and fruit sugar (fructose), which also occurs in honey
- Sorbitol chemical derivative of glucose, which is converted into fructose in the body. Used as a sugar substitute, found in many diabetic products, chewing gum, candy;
- Inulin a carbohydrate that is broken down from fructose.
All foods containing these compounds must be consistently avoided in dietary management.
Examples of foods containing fructose compounds that should be avoided.
All sugary foods, such as:
- Sweets of all kinds
- Industrially manufactured products, such as convenience foods and canned fruits and vegetables
- Some fruits and vegetables, as some have a particularly high fructose or sorbitol content, dried fruits, fruit juices.
- Jam, mayonnaise, ketchup, ready-made sauces.
- Household, invert and diabetic sugar, honey.
- Bread and baked goods, such as white bread, wholemeal bread, pumpernickel.
- Breakfast cereals such as corn flakes; muesli, oatmeal and nuts.
- Cured meats
- Lemonade
- Vinegar
- Alcohol
- Diabetic products
- All inulin-containing foods, such as Jerusalem artichokes, artichokes.
- Spices and spice blends with sugars, flavors.
- All foods made with sorbitol note ingredient list, sorbitol has the E number 420.
Such foods, where as an addition sugar-free on the packaging says, should be avoided in a fructose-free diet as well, because they may still contain sorbitol. The same applies to medicines whose coating consists of sugars.
Parents should not feed fruits or vegetables to infants with fructose intolerance during the first year of life. Substitution of nutrients and vital substances is recommended especially with:
- Vitamin C
- Vitamin B complex
- Calcium
- Magnesium
- Sodium
- Potassium
- Zinc.
In fructose malabsorption, the following foods are allowed after the first year of life and in adulthood, respectively:
- Self-prepared porridge, green beans, lettuce, lamb’s lettuce, chicory, broccoli, cauliflower, asparagus, cucumbers, spinach, peas, mushrooms, radishes, radishes, white cabbage, tomatoes, rhubarb, lemons.
- Limited potatoes are also allowed if they have been stored for at least 10-20 days, then peeled, cut and watered for one day
