Micronutrients & recovery
Lactic acid bacteria in fermented foods produce bioactive metabolites (postbiotics) such as biopeptides, vitamins, and GABA, which confer health benefits even if the bacteria themselves are not alive at consumption.
You don't always need live bacteria to get health benefits from fermentation. Look for fermented foods that produce bioactive compounds like biopeptides (which may help blood pressure), vitamins (B and K), and GABA (for stress/mood). These benefits exist even in heat-treated fermented products like some cheeses or baked sourdough, though live-culture foods offer an additional microbial boost.
Indeed, some LAB strains may exert health-promoting activity even if inactivated. The term ‘postbiotic’ was recently coined, indicating microbial metabolites or components of bacterial cell walls released in a matrix from which microbes are removed or inactivated and conferring health benefits when administered in sufficient amounts.
Why this rating
Review of genomic and metabolic studies; specific clinical trial data for general FF consumption is limited.
Source
The food-gut axis: lactic acid bacteria and their link to food, the gut microbiome and human health
Francesca De Filippis et al. · FEMS Microbiology Reviews · 2020
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →