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  1. 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.

  2. 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 …

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

    Oct 18, 2024 · Lactose is white and odorless, and you may sometimes see or hear it referred to as "milk sugar." Lactose is only found in milk from mammals, so plant-based milk products like …

  4. 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.

  5. 5 Foods High in Lactose to Avoid - WebMD

    Sep 15, 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.

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

    Nov 10, 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 …

  7. 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 …

  8. 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.

  9. Understanding Lactose: Comprehensive Guide to Its Roles

    Lactose, commonly known as milk sugar, is a disaccharide composed of two simple sugars: glucose and galactose. Found predominantly in dairy products, it plays a significant role in …

  10. Lactose Intolerance: Symptoms, Diagnostic Tests & Treatment

    Begin with a lactose-free diet, then gradually reintroduce lactose-containing foods to see how your system responds. Some people with lactose intolerance can tolerate up to 12 grams (g) of …