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Fructose intolerance
If you experience digestive issues after consuming foods containing fructose, this test is suitable for you. Genetic diseases often have a familial pattern, however, not all carriers of specific genes inevitably develop the associated disease. The presence of specific genes is just one aspect of the factors contributing to the development of the disease.
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Fructose intolerance
About this test
If you experience digestive issues after consuming foods containing fructose, this test is suitable for you. Genetic diseases often have a familial pattern, however, not all carriers of specific genes inevitably develop the associated disease. The presence of specific genes is just one aspect of the factors contributing to the development of the disease.
Benefits of fructose intolerance testing
- Total of 5 parameters measured
- Results within 15 working days
- Results allow you to adjust your diet if necessary
- A fructose intolerance test can reveal if problems with fructose metabolism are responsible for your digestive problems such as bloating, diarrhea, or abdominal pain.
- Identifies the presence of genes associated with fructose intolerance
At what symptoms to undergo screening
The following are typical symptoms of fructose intolerance:
- Flatulence (bloating), abdominal pain
- Vomiting, cramping, diarrhea
- Loss of appetite, weight loss
What´s measured
Fructose known as fruit sugar
Fructose, also known as fruit sugar, occurs naturally in fruits, honey, and certain vegetables. A synthetic version of fructose is also utilised as a sweetener in food products. Hereditary fructose intolerance stems from a mutation in the gene responsible for the enzyme aldolase B, which metabolises the fruit sugar fructose. Congenital fructose intolerance arises from mutations in the ALDOB gene, leading to decreased activity of the enzyme aldolase B and consequently impairing the body's capacity to metabolise fructose. A deficiency in the enzyme aldolase B results in the buildup of fructose 1-phosphate within liver cells, leading to their severe damage.
Genetic testing for fructose intolerance reveals it to be an autosomal recessive condition, wherein the patient carries two mutant alleles of the ALDOB gene [1].
Testing includes
The test monitors for the presence of genes associated with fructose intolerance, it detects four mutations in the aldolase B gene (del4E4, A149P, A174D, and N334K).
Notice
This is a genetic test that identifies the presence of genes associated with fructose intolerance.
The definitive diagnosis is determined by a physician, based on further examinations.
What’s inside
Collection instructions
The result of the genetic test is not affected by adherence to a fructose-free diet. Peripheral blood collection does not need to be performed while fasting and can be performed at any time of the day. The result of the test is not affected by the use of any medications, diets or smoking.
Please read these instructions carefully well in advance of the collection.
Please bring a valid ID (ID card or passport) to verify your identity.
Testing procedure
How takes place Fructose intolerance
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Your sample is analyzed in top-tier, accredited labs using state-of-the-art technology. Results are available within 15 business days.
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What interests you about the Fructose intolerance?
Which foods contain fructose?
Fructose (fruit sugar) occurs naturally in fiber-rich fruits (strawberries, apricots, blackberries, blueberries), honey, and some vegetables (onions, corn, watermelon). Its synthetic version is also used as a sweetener in foods.
What is fructose contained in?
Most of all in honey, in fruits rich in fiber and also in some vegetables (sweet potatoes, corn, watermelon). It is also contained in fructose syrup (a mixture of glucose and fructose) and together with the monosaccharide glucose forms the so-called sucrose.
How is fructose produced?
Chemically, fructose is a monosaccharide C₆H₁₂O₆, which is naturally produced by photosynthesis in plant leaves and is found in sweet ripe fruits and honey. Industrially, fructose is obtained from sugar cane, sugar beets or corn.
What is glucose and fructose?
Glucose (grape sugar) and fructose (fruit sugar) are monosaccharides. Their interaction produces the disaccharide sucrose (beet sugar). Unlike glucose, which is metabolized throughout the body, fructose is mostly metabolized in the liver.
How does a lack of sugar manifest itself in the body?
Hypoglycemia is not something to be taken lightly. The main symptoms are headaches, sweating, tremors, tingling in the limbs, vomiting, increased heart rate and feelings of anxiety, which can escalate into confusion, weakness, dizziness, loss of consciousness and even coma.
What can I replace fructose with?
Fructose, fruit sugar, can be replaced with glucose and fructose-free sweet foods. Rice syrup, which does not change the taste of food and does not contain fructose, is also a suitable alternative.
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Sources
[1] Ali M, Rellos P, Cox TM. Hereditary fructose intolerance. J Med Genet 1998; 35:353. Kim AY, Hughes JJ, Pipitone Dempsey A, et al. Pitfalls in the Diagnosis of Hereditary Fructose Intolerance. Pediatrics 2020; 146.