LESSON 5 · Your Gut: The Hidden Brain
Cultural Fermentation Wisdom
Many traditional food cultures discovered fermentation, and the range of techniques is remarkable. Korean kimchi uses a spice paste of chili, garlic, ginger, and fish sauce, and it is a staple of a cuisine often linked with good gut health.
Japanese cuisine features several fermented staples. Miso, natto, and pickled vegetables appear at many traditional meals. Natto — sticky fermented soybeans — is exceptionally rich in vitamin K2 and contains the enzyme nattokinase, which is being studied for possible cardiovascular benefits.
African fermented foods deserve more attention. Injera, the Ethiopian sourdough flatbread, is fermented before cooking, which develops flavor and can improve mineral availability, though the heat means it should not be treated as a live-probiotic food.