Study Puts Fermented Foods, Not Fire, As Pivotal Moment In Human Brain Growth

A recent study suggests that fermented foods, not the control over fire, played a crucial role in the growth of the human brain. The study notes that human brain expansion began around 2.5 million years ago, predating the use of fire by up to a million years. The researchers propose the External Fermentation Hypothesis, which states that fermented foods made it easier for early humans to absorb nutrients and free up energy for brain function.

The accidental consumption of fermented foods by our ancestors may have led to the development of a stable microbial ecosystem that aided in fermentation. This shift in diet towards fermented foods could have helped reduce the energy needed for digestion, allowing more energy to support brain growth. The implications of this hypothesis could lead to further research on the role of fermented foods in modern diets and their impact on gut health and mental well-being.