In China and Japan, people usually drink hot water instead of cold water after taking food.
By drinking cold water after a meal, oil products consumed in our diet will turn into solid and it creates problem for digestion. The mixture became solid react with the acid in our stomach.
It bursts faster than solid food and consumed by the intestine. It also relied on our gut just hangs. Very quickly, it turned into fats and lead to cancer.
So after dinner drink warm water or soup is good.
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