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THURSDAY, Nov. 15, 2018 (HealthDay News) — Low dietary carbohydrate intake is associated with increased energy expenditure during weight-loss maintenance, according to a study published online Nov. 14 in The BMJ<\/i> to coincide with the annual meeting of The Obesity Society (ObesityWeek), held from Nov. 11 to 15 in Nashville, Tennessee.<\/p>\n
Cara B. Ebbeling, Ph.D., from Boston Children’s Hospital, and colleagues examined the effect of diets varying in carbohydrate-to-fat ratio on total energy expenditure among 164 adults aged 18 to 65 years with a body mass index of 25 kg\/m\u00b2 or greater. Following weight loss on a run-in diet, participants were randomly assigned to a high, moderate, or low carbohydrate-content diet (60, 40, and 20 percent, respectively) for 20 weeks (54, 53, and 57 participants, respectively).<\/p>\n
The researchers found that in the intention-to-treat analysis, total energy expenditure differed by diet, with a linear trend of 52 kcal\/day for every 10 percent decrease in the contribution of carbohydrates to total energy intake. Compared with the high-carbohydrate diet, participants assigned to the moderate- and low-carbohydrate diets had 91 and 209 kcal\/day greater change in total energy expenditure, respectively. The corresponding differences were 131 and 278 kcal\/day in the per-protocol analysis. The differences between the low- and high-carbohydrate diets were 308 and 478 kcal\/day in the intention-to-treat and per-protocol analyses, respectively, among participants in the highest third of pre-weight-loss insulin secretion.<\/p>\n
“If metabolic benefits of reduced glycemic load diets are confirmed, development of appropriate behavioral and environmental interventions would be necessary for optimal translation to public health,” the authors write.<\/p>\n
One author received royalties for books on obesity and nutrition that recommend a low glycemic load diet.<\/p>\n
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