Lactose intolerance, also called lactase deficiency and hypolactasia, is the inability to digest lactose, a sugar found in milk and to a lesser extent milk-derived dairy products. The principal symptom of lactose intolerance is an adverse reaction to products containing lactose, including abdominal bloating and cramps, diarrhea and more.
The largest downfall of soy milk is the lack of calcium. It has only about a quarter of the calcium, compared to cow's milk. Many soy milk manufacturers are adding calcium to their products, but studies show that it is not as healthful as naturally-occuring calcium.
Soy milk, like cow's milk, is a good source of protein. It contains nearly 7 grams of protein per cup (240 ml). Unlike cow's milk, however, soy milk is low in fat and carbohydrate. That cup of soy milk offers only 4500 mg of fat with no cholesterol, and just 4 grams of carb.
Many foods can provide calcium and other nutrients the body needs. Non-milk products that are high in calcium include fish with soft bones such as salmon and sardines and dark green vegetables such as spinach.
If you drink a milkshake and soon afterward experience bloating, gas, abdominal pain, and diarrhea, the problem could be lactose intolerance--the incomplete digestion of the lactose in milk due to low levels of the intestinal enzyme lactase.
If lactase is deficient, undigested lactose enters the large intestine, where it is broken down by colonic bacteria, producing short-chain organic acids and gases (e.g., hydrogen, methane, carbon dioxide).
Lactose intolerance is very common in adults. It is rarely dangerous. Around 30 million American adults have some degree of lactose intolerance by age 20.
[L]actase, any of a group of enzymes found in the small intestine, liver, and kidney of mammals that catalyze the breakdown of lactose (milk sugar) into the simple sugars glucose and galactose.
Researchers have identified a possible genetic link to primary lactase deficiency. Some people inherit a gene from their parents that makes it likely they will develop primary lactase deficiency.
Lactose is a type of sugar found in milk and other dairy products. Lactose intolerance develops when the small intestine does not make enough of an enzyme called lactase. The body needs this enzyme to digest lactose.
Lactose is a carbohydrate, and as such a disaccharide. One molecule of lactose is built from one molecule each of two other carbohydrates, galactose and glucose.The galactose and glucose moieties are linked together through a so called beta-(1,4) glucosidic linkage.