Similarly, studies indicate that gut dwellers secrete messengers to cells lining the digestive tract to modulate key hormones, such as leptin and ghrelin, which are players in regulating metabolism, hunger and a sense of fullness.
Pregnant women often take antibiotics, and young children can get several rounds to fight ear and other infections, which can kill off these companions. Farmers commonly add antibiotics to animal feed to fatten their animals faster.
“We may have a generation of children growing up without the proper bacteria to regulate their leptin and ghrelin,” Blaser said.
Obese people appear to have a distinctive mix of digestive bacteria that make them prone to weight gain. Thin mice get fatter when their microbiota is replaced with the microbes of obese animals.
“Our ancient microbiome is losing the equilibrium it used to have with the host — us — and that has profound physiological consequences,” said Blaser, who published his concerns in a paper in the journal Nature in August.
Article Source: swcta.net