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Sucrose intolerance or genetic sucrase-isomaltase deficiency (GSID) is the condition in which sucrase-isomaltase, an enzyme needed for proper metabolism of sucrose (sugar) and starch (e.g., grains), is not produced or the enzyme produced is either partially functional or non-functional in the small intestine. All GSID patients lack fully ...
Sucrose and lactose are called disaccharides because they are made from two simple sugars, and are broken down into these simple sugars during digestion. Sucrose is broken down into glucose and another simple sugar called fructose, and lactose is broken down into glucose and galactose. As a result, lactose, sucrose and other compounds made from ...
Symptoms can manifest in a variety of ways and features might give a clue to the underlying condition. Symptoms can be intestinal or extra-intestinal - the former predominates in severe malabsorption. [citation needed] Diarrhoea, often steatorrhoea, is the most common feature. Watery, diurnal and nocturnal, bulky, frequent stools are the ...
With sucrose intolerance, the result of consuming sucrose is excess gas production and often diarrhea and malabsorption. Lactose intolerance is a similar condition that reflects an individual's inability to hydrolyze the disaccharide lactose. Sucrase is secreted by the tips of the villi of the epithelium in the small intestine.
Myopathy: Exercise intolerance, symptoms tend to improve with rest. "Second wind" phenomenon in most. Some have hypertrophic calf muscles. [16] Rhabdomyolysis and myoglobinuria possible. Some have muscle weakness. Of those with muscle weakness, in two-thirds it worsens, however in some the muscle weakness is stable.
These gradual metabolic adaptations during infancy make severe symptoms like unconsciousness or seizure uncommon before diagnosis. [citation needed] In the early weeks of life, undiagnosed infants with GSD I tolerate persistent hypoglycemia and compensated lactic acidosis between feedings without symptoms.
Signs and symptoms [ edit ] Because of the enormous number of these diseases and the numerous systems negatively impacted, nearly every "presenting complaint" to a healthcare provider may have a congenital metabolic disease as a possible cause, especially in childhood and adolescence.
The only treatment for classic galactosemia is eliminating lactose and galactose from the diet (e.g. exclusion of dairy products containing lactose). [9] [20] [21] Lactose-restricted diet is efficient in resolving acute complications; however, it is not sufficient to prevent long-term complications affecting the brain and female gonads. [20]