Gimchi is the most representative Korean fermented food, and one cannot imagine a Korean meal without it. The main ingredient is cabbage pickled in salt. Seasoning such as red pepper powder, garlic, ginger, scallions, radish, and others is added. After some salted seafood is added, it is kept at a low temperature for preservation and fermentation. Fermentation at a proper temperature is very important to have good-quality and tasty Gimchi. Koreans developed creative and wise ways of preserving Gimchi in different regions and seasons. Gimchi is healthy food in many aspects. It is anti-bacterial and its main ingredient vegetables are full of fiber, which is good for digestion. It is also good for preventing obesity, high blood pressure, diabetes, and cancers.