A Weighty Matter for Postmenopausal Women?

TOPLINE:

Eating more eggs is linked to weight gain in postmenopausal women, especially those with a high intake of Western foods such as processed and red meat, french fries, sweets, and deserts. Genetic predisposition for a high body mass index (BMI) also influences weight gain with higher egg intake.

METHODOLOGY:

• Egg consumption and elevated body weight are each linked to an increased risk for serious chronic diseases; however, whether elevated body weight mediates the association between egg intake and an elevated risk for serious chronic diseases needs further assessment.
• To investigate the association between eating eggs and weight gain, as well as the role of genetic susceptibility to an elevated BMI, researchers conducted a prospective study including 4439 postmenopausal women of European descent from the Women’s Health Initiative (WHI).
• They measured the participants’ consumption of egg and egg nutrients using a self-administered food frequency questionnaire.
• Changes in the consumption of eggs and egg nutrients such as cholesterol, choline, and betaine were assessed between baseline and follow-up visits at 1, 3, 6, and 9 years.
• The primary outcome was the change in body weight between baseline and each follow-up visit. Furthermore, an exploratory analysis evaluated how eating Western foods and genetic predisposition for a high BMI (assessed through a polygenic score) influenced weight change.

TAKEAWAY:

• An increased consumption of eggs was associated with weight gain, showing a positive linear trend at 1, 2, 3, and 6 years. By the third year, women whose egg consumption had increased by two eggs per week gained 0.70 kg more weight (P = .0002) than women whose egg consumption was reduced by 2.4 eggs per week (P-linear
• An increase in the consumption of nutrients obtained from eggs, including cholesterol (P-linear P-linear
• Women with a higher consumption of Western foods showed significant associations between changes in egg, cholesterol, and choline intake and weight gain.
• A significant association was found between the BMI polygenic score and changes in body weight, with women most genetically predisposed to a higher BMI showing greater weight gain when their egg consumption increased by an average of 3.5 eggs per week.

IN PRACTICE:

“These results suggest that even relatively small increases or decreases in egg consumption could cause increases or decreases, respectively, in body weight among postmenopausal women, unless there are adequate compensating changes in factors such as dietary energy intake or physical activity,” the authors wrote. “Our results require confirmation,” they added.

SOURCE:

This study, led by James A. Greenberg, Department of Health and Nutrition Sciences, Brooklyn College, The City University of New York, was published online in Clinical Nutrition.

LIMITATIONS: 

This observational study was susceptible to residual confounding, which suggests that the observed associations may not have established causality. Additionally, the results were according to data from a group of postmenopausal American women of European descent, which limited the generalizability to other populations.

DISCLOSURES:

The WHI program was funded by the National Heart, Lung, and Blood Institute, National Institutes of Health, US Department of Health and Human Services. The authors declared no conflicts of interest.

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.