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By Science News
I was interested to read about factors influencing the “hunger hormone’s” —ghrelin’s—effectiveness. 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.
Julia Morgan
Houston, Texas
Maureen Moss
Cardiff, Calif.
Elizabeth Pierce
Fallbrook, Calif.