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  1. What Is Lactose? - Cleveland Clinic Health Essentials

    Oct 29, 2024 · Lactose is a natural, complex sugar produced in all mammalian milk that’s difficult to breakdown unless you have lactase, a protein, in your small bowel.

  2. Lactose: Uses, Health Benefits, and Lactose Intolerance

    Oct 18, 2024 · Lactose is a natural sugar found in milk that has uses in drugs and food. Some have difficulty digesting it. Reviewed by a board-certified physician.

  3. 5 Foods High in Lactose to Avoid - WebMD

    Sep 16, 2024 · Lactose is a sugar naturally found in dairy products like milk, butter, yogurt, and more. Learn which 5 foods to avoid for lactose intolerance.

  4. Lactose intolerance - Symptoms & causes - Mayo Clinic

    Sep 22, 2025 · Lactose intolerance is a condition that makes it hard to digest the sugar in milk and milk products, called lactose. People with lactose intolerance often have diarrhea, gas and …

  5. Lactose - Wikipedia

    Lactose is a disaccharide composed of galactose and glucose, which form a β-1→4 glycosidic linkage. Its systematic name is β- D -galactopyranosyl- (1→4)- D -glucose.

  6. What Is Lactose? - IFIC

    May 6, 2024 · Lactose is sometimes referred to as “milk sugar” because it is only found naturally in the milk of mammals—including cows, goats and humans. Milk from cows and goats is used …

  7. Lactose Definition & Meaning | U.S. Dairy

    Dec 20, 2017 · Lactose is the natural sugar in milk and other dairy foods made from milk like yogurt and ice cream that forms when two other sugars, glucose and galactose, join together.

  8. Lactose | Milk Sugar, Digestion & Nutrition | Britannica

    Sep 16, 2025 · Lactose, carbohydrate containing one molecule of glucose and one of galactose linked together. Composing about 2 to 8 percent of the milk of all mammals, lactose is …

  9. Definition & Facts for Lactose Intolerance - NIDDK

    Learn about lactose intolerance, a condition in which you have symptoms—such as bloating, diarrhea, and gas—after you consume foods or drinks that have lactose.

  10. What is Lactose? - Lactose Liberators

    Aug 28, 2024 · Lactose is a natural sugar found in milk and dairy products, serving as the primary carbohydrate in these foods. Understanding lactose and its effects on the body is essential for …