Secret to glowing skin: "Drink 2 liters or more a day + healthy diet"

In response to a fan's compliment that he had achieved dewy skin, Park Bo-gum boasted, "I have dewy skin. It's no joke." When asked by a fan what he thought about drinking 2 liters, Park Bo-gum advised, "I think I consistently drink that amount. I think it would be good for you all to give it a try consistently as well."