I was interested to read about factors influencing the “hunger hormone’s”—ghrelin’s—effectiveness (“Still Hungry?” SN: 4/2/05, p. 216). One factor not considered but seemingly very significant is physical activity. I suggest that it is more useful to understand and encourage the positive effects of physical activity on overall well-being than to develop new drugs that artificially manipulate the release of hormones and encourage our increasingly sedentary lifestyles.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.