Sauerkraut for Immune Function

Research suggests that sauerkraut and related fermented foods may play a role in modulating immune function, though the current evidence base is limited in scope. A 2022 laboratory study found that sauerkraut brine appeared to influence immune signaling in human intestinal and immune cells, stimulating both pro- and anti-inflammatory markers in a pattern the researchers interpreted as consistent with a balanced immune response, while a 2007 systematic review of probiotic research found indirect support for immune benefits in athletes under physical stress. The available evidence consists of cell-based laboratory work and a systematic review of probiotic supplements broadly rather than sauerkraut specifically, meaning findings cannot yet be directly extrapolated to human consumption of sauerkraut. Overall, the research points in a supportive direction but remains preliminary, and more human clinical trials focused specifically on sauerkraut would be needed to draw firmer conclusions.