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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 ...
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 ...
A ketogenic diet has a remarkable effect on CNS-symptoms in PDH-deficiency and has also been tried in complex I deficiency. [49] A ketogenic diet has demonstrated beneficial for McArdle disease ( GSD-V ) as ketones readily convert to acetyl CoA for oxidative phosphorylation, whereas free fatty acids take a few minutes to convert into acetyl CoA ...
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 ...
Sucrase-isomaltase is a bifunctional glucosidase (sugar-digesting enzyme) located on the brush border of the small intestine, encoded by the human gene SI. It is a dual-function enzyme with two GH31 domains, one serving as the isomaltase , the other as a sucrose alpha-glucosidase .
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.
Infants with classic galactosemia cannot be breast-fed due to lactose in human breast milk which consists of both galactose and glucose and are usually fed a soy-based formula. [21] Galactosemia is sometimes confused with lactose intolerance, but galactosemia is a more serious condition.
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.