Lowering dietary carbohydrate intake could help in maintaining weight loss, new research suggests. However, some experts say the trial methodology makes drawing conclusions difficult.
Findings from a randomized trial comparing the metabolic effects of diets of varying carbohydrate-to-fat ratio were presented November 14 here at Obesity Week 2018 by David S. Ludwig, MD, and Cara B. Ebbeling, MD, both of the New Balance Foundation Obesity Prevention Center, Boston Children's Hospital, and Harvard Medical School, Boston, Massachusetts. The findings were simultaneously published in BMJ.
The study found that lowering dietary carbohydrate increased energy expenditure during weight loss maintenance, especially among those with high insulin secretion. However, the investigators' use of doubly labeled water to measure energy expenditure was called into question during the Obesity Week symposium by Kevin Hall, PhD, a senior investigator at the National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland.
The bottom line, symposium chair and Obesity Society president Caroline M. Apovian, MD, told Medscape Medical News, is, "We need to do more studies to show that this is actually the case. There's controversy...This may mean that we haven't yet figured out how to find out what each individual person needs to eat for better health."