There are thousands of books and research papers written on benefits of fermented foods. Koji fermentation, in particular, brings extraordinary health benefits, not only for gut functions, but for the entire body.
It creates vitamins and nutrients, including essential amino acids, degrades hard molecules so that our body can absorb maximum nutrients from food, and provides large amounts of enzymes for metabolic functions.
Miso in particular is scientifically proven to have anti-cancer, anti-radiation, and anti-oxydant (anti-ageing) properties.
Simply put, koji fermentation is magic !