Why Asians don't like yoghurts?

picture: http://i.dailymail.co.uk

Lactose intolerance is the answer. Lactose is a sugar found in milk products and it needs to be digested  by our gastrointestinal tract with the help of enzyme lactase. 

The percentage of the population that has a decrease in lactase as they age is less than 10% in Northern Europe and as high as 95% in parts of Asia and Africa. 

Main symptoms of lactose intolerance are: 

1. abdominal pain
2. bloating
3. diarrhea, gas, nausea

Symptoms starts in 2,5h after drinking milk or eating any kind of food containing lactose.