Human stomach acidity is approximately a thousand times greater than that of chimpanzees, associated with consuming phylogenetically distant and potentially rotting foods.

“how do we know the reason our stomachs became a thousand times more acidic than a chimp is because of animal food consumption and there are some really good studies which address this that i talked about in the book i will screen share one of these there have been some really interesting analyses looking at different species looking across birds looking across humans looking at chimps looking at other animals and what has been found consistently is that the ph of the stomach meaning the amount of acid in the stomach with a lower ph indicative of more acidic or more protons in the concentration is associated with phylogenetically distant foods meaning they are more likely to um eat foods that are distant than them and that are likely to be rotting”