Napa Cabbage Kimchi

Koreans were preserving vegetables in salt long before kimchi turned red. Early terms for the practice center on the idea of vegetables soaked or submerged, and the late-Goryeo scholar Yi Gyu-bo wrote of radish kept in jang for summer and turnip salted for the long winter. Through the 1600s, cookbooks such as Eumsik dimibang describe kimchi seasoned with salt and aromatics like Sichuan pepper, with no chili at all.

Chili peppers came late. The first Korean written reference is generally traced to Yi Su-gwang's Jibong yuseol (1614), which describes the plant as having arrived from Japan. It took roughly another century and a half for chili to enter kimchi in writing: the Jeungbo sallim gyeongje (1766) records recipes using ground chili, and by the late 18th century fermented seafood (jeotgal) was also being worked into the seasoning.

The cabbage itself is the newest piece. Older Korean cabbage was a loose, leafy plant; the dense, tightly headed napa cabbage that is split and stuffed today became common on Korean tables only around a century ago. Whole-head napa kimchi as we know it is therefore a fairly modern dish built on a very old habit.

It is also the centerpiece of kimjang, the late-autumn gathering in which families and neighbors make and share kimchi to last the winter. UNESCO inscribed "Kimjang, making and sharing kimchi in the Republic of Korea" on its Representative List of the Intangible Cultural Heritage of Humanity in 2013.

• Vegetable-forward: kimchi is low in calories and a convenient way to add vegetables to a meal; extension guidance notes it supplies vitamins such as A and C along with various plant compounds.
• Lactic acid fermentation: the fermentation is driven by bacteria naturally present on the vegetables — notably Leuconostoc, Weissella and Lactobacillus species — so no starter culture is needed. Unpasteurized kimchi contains live microbes, though how much any particular batch benefits health is still being studied.
• Research is ongoing: a Korean case-control study published in 2021 reported a non-significant trend toward lower gastric cancer risk with moderate (rather than high) intake of pickled vegetables including kimchi; the authors called for further research. Kimchi should not be thought of as a treatment for any condition.

• Northern provinces: kimchi from the colder north tends to be milder and lighter on seasoning, often with more broth; Hamgyeong cooks were known for adding lean fish such as pollock or cod for a clean, cool flavor.
• Jeolla: a rich style that uses salted yellow croaker and other jeotgal, with sesame and glutinous rice paste in the seasoning; whole-head cabbage kimchi is among the region's listed specialties.
• Gyeongsang: seasoned with anchovy jeotgal, and traditionally saltier with little broth — a practical choice for a warmer climate.
• Chungcheong: many cooks traditionally season with salt alone rather than fermented seafood sauce.
• Seoul and Gyeonggi: a varied, elaborate repertoire that includes bossam-kimchi (wrapped kimchi) and baek-kimchi (white kimchi made without chili), though regional lines have blurred as people have moved.