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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: Uses, Health Benefits, and Lactose Intolerance

    4 days ago · 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 …

  3. 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 …

  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. Lactose | Milk Sugar, Digestion & Nutrition | Britannica

    Dec 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 …

  6. 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.

  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. 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 …

  9. Lactose Intolerance – Cause, Symptoms, Diagnosis, Treatment

    Feb 22, 2024 · Lactose is the sugar that’s in milk. Our bodies use an enzyme called lactase to break down that sugar so we can absorb it into our bodies. But people with lactose intolerance …

  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 …