Final answer:
People with lactose intolerance have varying levels of tolerance, but most can handle up to 12 grams of lactose, or about one cup of milk, spread throughout the day. Lactose intolerance varies widely, and alternatives like lactose-free milk and lactase supplements can help manage symptoms.
Step-by-step explanation:
The question addresses the issue of lactose intolerance, particularly regarding how much milk individuals with decreased lactase production can typically tolerate. Lactose intolerance is the result of the small intestine not producing sufficient amounts of the enzyme lactase, which is necessary to properly digest lactose found in milk. This condition leads to symptoms such as bloating, cramps, nausea, and vomiting when dairy products are consumed.
Those with lactose intolerance often have varying degrees of intolerance. While some may be able to consume small amounts of milk without significant symptoms, others might experience discomfort even with minimal intake. It is reported that most individuals with lactose intolerance can tolerate up to 12 grams of lactose, equivalent to about one cup of milk, spread out throughout the day. However, tolerance levels are highly individualized and some may be more sensitive.
For those who are lactose intolerant, alternatives such as lactose-free milk or lactase enzyme supplements can be used to aid digestion and alleviate symptoms. Additionally, prebiotic adaptation over time might improve tolerance to lactose, as the gut flora adjusts to the presence of dairy in the diet.