Zach emphasizes the staggering need for gut biodiversity, highlighting that a healthy gut should host 30,000 to 40,000 species of bacteria, akin to a vibrant rainforest or coral reef. Unfortunately, modern diets and practices have drastically reduced this diversity, leaving us with only about 1,000 species. This loss over the last century reflects a misguided evolutionary belief that we must eliminate bacteria rather than nurture them.
