The roots of plants frequently serve as energy storage sites and are, thus, rich in starch.
  • By stimulating the growth of beneficial intestinal microorganisms, prebiotics offer a host of downstream health benefits, which I will discuss in more detail shortly. However, the fiber in foods also has a drawback in that it can inhibit the absorption of certain micronutrients, such as iron, when consumed in large quantities. Food sources of resistant starch include: Most foods contain a complex mixture of the dietary fibers and starches I’ve discussed here.
  • In fact, green tea polyphenols have been found to exert prebiotic properties on the gut microbiota, at least in animal studies. We will cover starch in more depth shortly.