The breakdown of complex macromolecules in foods to
absorbable nutrients is accomplished by the mouth,
stomach, and gut. Trillions of bacteria live inside
the human gut.
These microbes perform a variety of duties:
producing vitamins B and K, breaking down dietary
fiber, facilitating the absorption of nutrients, and
shaping the ecosystem in our gut.
In past decades, numerous research studies have
demonstrated links between gut microbiota and the
immune system, mood, cognitive function, metabolic
rate, and even the way we age.