Kimchi linked to immune cell changes during severe flu season

A small 12-week study reported single-cell changes in immune signaling after daily intake of a kimchi powder equivalent to 30 grams of fresh kimchi; researchers saw increased activity in antigen-presenting cells and shifts in CD4 T cells. The article also reports a physician's caution that the study did not measure clinical illness and noted kimchi can be high in sodium.

Kimchi, a fermented cabbage dish long eaten in Korea, is drawing scientific attention for possible effects on immune-related processes during a notable flu season. A study published in the journal npj Science of Food reported single-cell changes in immune signaling after a daily kimchi powder supplement taken over 12 weeks. The trial involved 13 overweight adults and used a powder described as equivalent to 30 grams of fresh kimchi. Commentary in the article noted the measurements were of blood-cell activity and gene signals rather than clinical illness outcomes. Key findings: - The study was published in npj Science of Food and reported single-cell changes in immune signaling tied to kimchi powder consumption. - The trial lasted 12 weeks and included 13 overweight adult participants who took a daily capsule equivalent to about 30 grams of fresh kimchi. - Researchers reported increased activity in certain antigen-presenting immune cells and observed changes in CD4 T cells. - The study measured blood-cell signaling and gene activity, but did not assess whether participants got sick less often or other clinical immune outcomes. - Dr. Zaid Fadul, quoted in the article, cautioned against overinterpreting the findings and noted that kimchi can contain substantial sodium, with one serving reported as roughly 500 to 1,000 milligrams. Summary: The study suggests kimchi-related supplementation was associated with measurable changes in immune cell signaling, while clinical effects on illness were not assessed. Undetermined at this time.