Lactose


Image Caption : Lactose Molecule : Lactose, sometimes referred to as `milk sugar,` is a disaccharide found in milk and milk products such as cheese and yogurt. It is composed of glucose and galactose, and frees these two monosaccharides when metabolized. Lactose is broken down by the enzyme lactase, produced by the cells lining the small intestine, which releases glucose and galactose so they can be absorbed and used for energy.

In this model, carbon atoms are dark gray, hydrogen atoms are white, and oxygen atoms are red.

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Lactose

A disaccharide of GLUCOSE and GALACTOSE in human and cow milk. It is used in pharmacy for tablets, in medicine as a nutrient, and in industry.

Glucose

A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement.

Galactose

An aldohexose that occurs naturally in the D-form in lactose, cerebrosides, gangliosides, and mucoproteins. Deficiency of galactosyl-1-phosphate uridyltransferase (GALACTOSE-1-PHOSPHATE URIDYL-TRANSFERASE DEFICIENCY DISEASE) causes an error in galactose metabolism called GALACTOSEMIA, resulting in elevations of galactose in the blood.

National Center for Biotechnology Information, U.S. National Library of Medicine

Carbohydrates

Also called: Carbs

Carbohydrates are one of the main types of nutrients. They are the most important source of energy for your body. Your digestive system changes carbohydrates into glucose (blood sugar). Your body uses this sugar for energy for your cells, tissues and organs. It stores any extra sugar in your liver and muscles for when it is needed.

Carbohydrates are called simple or complex, depending on their chemical structure. Simple carbohydrates include sugars found naturally in foods such as fruits, vegetables, milk, and milk products. They also include sugars added during food processing and refining. Complex carbohydrates include whole grain breads and cereals, starchy vegetables and legumes. Many of the complex carbohydrates are good sources of fiber.

For a healthy diet, limit the amount of added sugar that you eat and choose whole grains over refined grains.



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