Certainly the amount of calories matters when it comes to weight loss, but whether the type of calories has any impact is more controversial. The results of several recent studies, however, provide a convincing argument that the type of calories matters. Take for example a study published in the
American Journal of Clinical Nutrition
that examined the effects of increasing protein in place of fat while keeping carbs constant. In this study, protein was increased from 15% to 30% and fat reduced from 35% to 20% (carb was constant at 50%). The increase in protein was clearly associated with reduced appetite and caloric intake, which ultimately led to a significant weight loss. Exactly how
protein curbs appetite
is unknown, but this study suggests it may affect one of the most potent appetite hormones—leptin. Regardless of how it works, the data seem clear —
increasing protein helps reduce appetite
and caloric intake. This means it is a lot easier to lose weight when you bump up the MyoZene
Weigle DS, Breen PA, Matthys CC, Callahan HS, Meeuws KE, Burden VR, Purnell JQ. A high-protein diet induces sustained reductions in appetite, ad libitum caloric intake, and body weight despite compensatory changes in diurnal plasma leptin and ghrelin concentrations. Am J Clin Nutr. 2005 Jul;82(1):41-8.