Why is the garlic water in the restaurant so spicy?

Garlic water in restaurants is usually chopped garlic and then soaked in cold water, so garlic water has a spicy taste, which is much better than that at home.

There is a kind of alliinase in this kind of garlic cell, which will form allicin with strong pungent smell when it comes into contact with water. Therefore, minced garlic is more likely to volatilize this taste.