Can an adult without genetic lactase persistence still develop a tolerance for dairy foods?

Question

While investigating the rise of adult lactose tolerance, I came across the news that China has been encouraging its citizens to drink more milk, even though most of the Asian population lacks the SNP (single-nucleotide polymorphism) which conveys lactase persistence. Is it still possible for an adult without lactase persistence to build-up a tolerance for lactose over time? If so, what's the mechanism?

Answer 1

No. it is not possible. Adults become lactose intolerant because their bodies stop producing the enzyme needed to break down lactose. Instead, bacteria digest lactose and cause gas, which is the discomfort people feel. Therefore, there is no way to reactivate the protein.

Why China is encouraging their lactose-intolerant to drink milk is a very good question. Based on an article from Quartz, the reason is because the Chinese culture now views drinking milk is healthy.