Food Journals Help Dieters Lose Weight, Study Shows
July 13, 2012 -- If you want to lose weight, you need to eat less -- and if you want to eat less, it helps to write it down.
When researchers studied the eating behaviors of female dieters they found that two of the most important tools linked to successful weight loss were a pen and notebook.
Women who kept food journals and consistently wrote down the foods they ate lost more weight than women who didn't.
Skipping meals and eating out frequently, especially at lunch, led to less weight loss.
Researcher Anne McTiernan, MD, PhD, says based on the study results, the number one piece of advice someone should follow if they want to lose weight is, "Keep a food journal."
"It's about accountability, knowing what you're eating and how much, and how that all adds up compared with your calorie goal for losing weight," she tells WebMD.
The study appears in the latest issue of the Journal of the Academy of Nutrition and Dietetics.
Journal Keepers Lost More Weight
The study included 123 previously inactive, overweight, postmenopausal women in Seattle enrolled in a weight loss study.
Over the course of a year, the women followed a restricted-calorie diet with the goal of achieving a 10% reduction in weight in six months. Half the women were put on an exercise program and the other half were not.
All the participants were asked to record the foods they ate daily in seven-day diaries provided weekly by dietician counselors.
During the study, the women also completed a series of questionnaires designed to assess their individual eating-related behaviors and strategies to achieve weight loss.
At the end of the year, both the diet-alone and diet-and-exercise groups had lost an average of 10% of their starting weight.
Meal Skippers Lost Less
Among the specific findings:
- Women who consistently filled out the food journals lost about 6 pounds more than those who didn't.
- Those who skipped meals lost an average of 8 fewer pounds than those who didn't.
- Women who ate in restaurants at lunch at least once a week lost an average of 5 pounds less than those who ate out less.
"Eating out may be a barrier for making healthful dietary changes because it usually means less individual control over ingredients and cooking methods, as well as larger portion sizes," the researchers wrote.