Chris Kresser’s one of Nerd Organics favorites when it comes to knowledge on diet, nutrition, exercise, & paleo. He emphasizes the importance of gut bacteria and it’s relationship to overall health.
from Chris Kresser’s Health For the 21st Century:
We’ve only recently begun to understand the extent of the gut flora’s role in human health and disease. Among other things, the gut flora promotes normal gastrointestinal function, provides protection from infection, regulates metabolism and comprises more than 75% of our immune system. Dysregulated gut flora has been linked to diseases ranging from autism and depression to autoimmune conditions like Hashimoto’s, inflammatory bowel disease and type 1 diabetes.
Unfortunately, several features of the modern lifestyle directly contribute to unhealthy gut flora:
Antibiotics and other medications like birth control and NSAIDs
Diets high in refined carbohydrates, sugar and processed foods
Diets low in fermentable fibers
Dietary toxins like wheat and industrial seed oils that cause leaky gut