Some people notice it slowly. A glass of milk that once felt harmless now brings discomfort. Others remember it clearly, a ...

A version of this post first appeared on Dr. Ayala’s Open Salon blog. Are most Americans lactose intolerant? Do all dairy products contain lactose? How critical is it to stick to a lactose-free diet?

This question originally appeared on Quora. Answer by Ti Zhao, biomedical engineer: Sort of. It’s somewhat complicated since there are genetic as well as environmental components to this. Natural ...

Dealing with an upset stomach after consuming dairy items? This may indicate lactose intolerance. Switch to these for similar ...

Lactose intolerance occurs when your body is unable to digest the sugar lactose, which is found in milk and milk products. This causes uncomfortable symptoms including gas, bloating, cramps and even ...

What do pizza, milk shakes and ice cream have in common besides being delicious and being loaded with calories? Surprisingly, majority of the people on this planet find it difficult to digest these ...

Regretting that slice of pizza or double-scoop ice cream cone? If you’ve ever felt bloated, gassy or just plain unwell after a dish of ice cream or a meal laden with cheese, then you may well know the ...

Lactose, the sugar found in milk, is digested in the intestine by the enzyme lactase. People who lack this enzyme suffer from a condition called lactose intolerance. In their bodies, milk sugar moves ...

A curious and paradoxical intolerance for lactose across the South Asian subcontinent could help explain why the ability for ...

If you feel symptoms such as cramps, bloating, diarrhea, and nausea after eating dairy foods, you’re definitely not in the minority. It all started thousands of years ago, when humans turned from ...

It's estimated that up to 50 million Americans are lactose-intolerant to one degree or another: They can't digest dairy products. It can be tough avoiding dairy, but that doesn't mean lactose-free ...