When we talk about the intestine, we are mainly referring to the small intestine, where 90% of food is absorbed.. The quality of health in the intestine depends on the microbiota (also known as intestinal flora), which is made up of microscopic organisms (eg, bacteria, viruses, and fungi) that live in the intestines. Healthy gut flora, often called “good bacteria,” helps with digestion, supports immune function, and is even linked to cognitive function and mood.
For proper nutrient absorption, a healthy gut needs microbial diversity, a healthy gut lining (which, by the way, vitamin D plays a key role in supporting the immune function of the intestinal mucosa), and the right conditions or complementary nutrients (for example, some fat for fat-soluble nutrients like vitamin D!)
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