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Related to fructose intolerance: lactose intolerance
, Hereditary fructose intolerance
Etymology: L, fructus, fruit, in + tolerare, to bear
an inherited disorder marked by an absence of enzymes needed to metabolize fructose. Symptoms include sweating, tremors, confusion, digestive distress with vomiting, and failure of infants to grow. The condition is transmitted as an autosomal-recessive trait. Also called hereditary fructose intolerance
Inability to metabolize the carbohydrate fructose due to a hereditary absence or deficiency of the enzyme 1,6-biphosphate aldolase B. Clinical signs develop early in life. They include hypoglycemia, jaundice, hepatomegaly, vomiting, lethargy, irritability, and convulsions. Fructose can be identified in the urine. The fructose tolerance test should not be used because it can induce irreversible coma.
Acute attacks are treated by glucose administration. For long-term therapy, all foods containing fructose (present in sweet fruits and sugar cane) and sucrose and sorbitol (the latter used as a sweetening agent in foods and drugs) must be eliminated from the diet.