A recent study has revealed that individuals who consume at least one egg daily for five or more days each week may experience a significant reduction in their risk of developing Alzheimer's disease, with a potential decrease of up to 27%.
Joan Sabaté, MD, DrPH, a professor at Loma Linda University School of Public Health and the lead investigator of the study, stated, "Compared to those who never eat eggs, consuming at least five eggs weekly can lower the risk of Alzheimer's." Even modest egg consumption was associated with protective benefits; those who ate eggs 1 to 3 times a month had a 17% lower risk, while individuals consuming eggs 2 to 4 times per week showed a 20% reduction in risk.
The research, titled "Egg intake and the incidence of Alzheimer's disease in the Adventist Health Study-2 cohort linked with Medicare data," was published in the Journal of Nutrition. This study aimed to explore how dietary habits, which can be modified, might impact the likelihood of developing Alzheimer's disease.
Nutrients in Eggs May Support Brain Health
According to Sabaté, eggs are rich in several nutrients that are vital for brain health. They are an excellent source of choline, which the body uses to produce essential compounds like acetylcholine and phosphatidylcholine, both crucial for memory and neuronal communication.
Additionally, eggs are packed with lutein and zeaxanthin, carotenoids that accumulate in brain tissue and have been associated with enhanced cognitive performance and reduced oxidative stress. Furthermore, eggs are a source of omega-3 fatty acids, while the yolk is notably high in phospholipids, comprising nearly 30% of total egg lipids. These compounds are integral to the functioning of neurotransmitter receptors.
Large Study Tracks Egg Intake and Alzheimer's Diagnoses
Researchers evaluated egg consumption through both direct and indirect sources, including eggs consumed alone (scrambled, fried, or boiled) and those incorporated in various foods like baked goods. The study monitored approximately 40,000 participants from the Adventist Health Study 2 cohort, identifying Alzheimer's cases through physician diagnoses recorded in Medicare data. Participants were followed for an average duration of 15.3 years.
Balanced Diet Still Key, Researchers Say
The research team emphasized the importance of incorporating eggs into a balanced diet rather than focusing solely on their consumption. Jisoo Oh, DrPH, MPH, an associate professor of epidemiology at Loma Linda University School of Public Health and the study's lead author, remarked, "Research supports eggs as part of a healthy diet. Seventh-day Adventists tend to follow healthier eating patterns than the general population, and we encourage a holistic approach to health alongside the benefits of eggs."
Some funding for this study was provided by the American Egg Board, while the National Institutes of Health supported the establishment of the original cohort and its data.
