Tag: Human feces

A 2022 study in *Frontiers in Nutrition* confirmed that human gut microbial communities produce vitamin B12, making the presence of is vitamin B12 in human feces a natural biological process. However, this intrinsic bacterial production is not a reliable source of the vitamin for the human host.

According to Britannica, human feces are composed of 75 percent water and 25 percent solid material. A small but significant portion of that solid waste, typically 2 to 3 percent by weight, is protein from sources other than undigested food.