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Galactose (/ ɡ ə ˈ l æ k t oʊ s /, galacto-+ -ose, "milk sugar"), sometimes abbreviated Gal, is a monosaccharide sugar that is about as sweet as glucose, and about 65% as sweet as sucrose. [2] It is an aldohexose and a C-4 epimer of glucose. [3] A galactose molecule linked with a glucose molecule forms a lactose molecule.
Fat has a food energy content of 38 kilojoules per gram (9 kilocalories per gram) proteins and carbohydrates 17 kJ/g (4 kcal/g). [2] Water makes up a large proportion of the total mass ingested as part of a normal diet but it does not provide any nutritional value.
Galactooligosaccharides (GOS), which also occur naturally, consist of short chains of galactose molecules. Human milk is an example of this and contains oligosaccharides, known as human milk oligosaccharides (HMOs), which are derived from lactose. [21] [22] These oligosaccharides have biological function in the development of the gut flora of ...
Raffinose can be hydrolyzed to D-galactose and sucrose by the enzyme α-galactosidase (α-GAL), an enzyme synthesized by bacteria found in the large intestine. α-GAL also hydrolyzes other α-galactosides such as stachyose, verbascose, and galactinol, if present. In plants, raffinose plays a significant role in stress responses, particularly ...
A range of factors come into play when determining the yield, style, and type of GOS produced. These factors include: enzyme source; enzyme dosage; feeding stock (lactose) concentration; origins of the lactose; process involved (e.g. free or immobilized enzyme) reaction conditions impacting the processing situation; medium composition
These high-fiber foods are delicious and expert-approved. Incorporate these picks into your diet for a hefty dose the many benefits fiber promises. 20 expert-approved high-fiber foods to keep you ...
After separation from glucose, galactose travels to the liver for conversion to glucose. [12] Galactokinase uses one molecule of ATP to phosphorylate galactose. [2] The phosphorylated galactose is then converted to glucose-1-phosphate, and then eventually glucose-6-phosphate, which can be broken down in glycolysis. [2]
The "empty calories" argument states that a diet high in added (or 'free') sugars will reduce consumption of foods that contain essential nutrients. [149] This nutrient displacement occurs if sugar makes up more than 25% of daily energy intake, [ 150 ] a proportion associated with poor diet quality and risk of obesity. [ 151 ]