Milk allergy is often confused with lactose intolerance. However, these two conditions are quite different.
Milk allergy results from a reaction to the dairy proteins in milk. These proteins trigger an immune system response, causing severe reactions such as trouble breathing, diarrhea, vomiting, and eczema. If you are allergic to milk, you must avoid milk and any products containing milk, since a tiny amount can set off a reaction. This type of allergy occurs mainly in children, fortunately disappearing by age 3 in most cases.
Lactose intolerance, unlike milk allergy, does not trigger an immune system reaction. This condition stems from the inability to digest the lactose (natural milk sugar) in dairy products. Lactose intolerance can causes reactions similar to digestive problems, including bloating, stomach cramps, diarrhea and gas7. People with lactose intolerance can consume dairy products in small amounts, depending on their tolerance threshold8, 9. Some dairy products, including yogurt, are better tolerated8. The active dairy cultures in yogurt support the absorption of lactose. By hydrolysing the lactose, they make it easier to digest8.
- 7. Web site of Extenso, the reference centre on human nutrition: www.extenso.org. (In French)
- 8. "Laits fermentés et maldigestion du lactose", Nutritopics : Danone World Newsletter, Nr 12, August 1996:
http://www.danonevitapole.com. (In French)
- 9. "Diarrhea and fermented milk", Nutritopics : Danone World Newsletter, Nr 8, April 1995:
http://www.danonevitapole.com.