Monsanto’s own studies, as well as those of Eli Lilly & Co., have found a 10-fold increase in IGF-1 levels in the milk of cows who have been injected with bovine growth hormone (BGH).

She and her co-authors found that marketers take advantage of boys’ need to forge their identity in adolescence and sell them a narrow version of masculinity.

In tests, Dr Dunn and his co-authors found the link between gut feelings and intuitive decision-making to be stronger in people who were more aware of their own heartbeat.