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273 pages, Paperback
First published February 28, 2014
95% of our body's serotonin is produced in our gut.
Our gut bacteria have 150 times more genes than a human being.
Saliva produces a painkiller called opiorphin - stronger than morphine and only discovered in 2006.
The surface area of our digestive system is about 100 times greater than the area of our skin.
Studies have shown that our gut bacteria has the ability to influence cravings in our brain for particular foods.
The total mass of bacteria in our body equals roughly 2.2 kilos.