Sauerkraut Juice for Immune Function

The two studies linked here do not appear to be relevant to sauerkraut juice or immune function — both investigate the use of self-reported odor intensity ratings as a population-level screening tool for COVID-19 infection, with no connection to dietary interventions or fermented foods. Research suggests these observational and survey-based studies were designed to evaluate olfactory perception as a proxy measure for COVID-19 prevalence, finding correlations between reduced smell ratings and infection rates, but they do not address sauerkraut juice, probiotics, or immune outcomes in any form. As a result, no evidence-based summary can be drawn from these studies regarding the use of sauerkraut juice for immune function. Readers interested in this topic should seek out studies specifically examining fermented food consumption, probiotic strains found in lacto-fermented vegetables, or related immunological endpoints.