Researchers tracking nearly 40,000 older adults over more than 15 years found that frequent egg consumption was associated with significantly lower rates of Alzheimer’s disease diagnoses.
By yourNEWS Media Newsroom
A large long-term study published in The Journal of Nutrition found that older adults who regularly consumed eggs experienced a substantially lower risk of developing Alzheimer’s disease over a 15-year period.
The research analyzed data from the Adventist Health Study-2 involving 39,498 participants age 65 and older. Researchers found that individuals who ate eggs five or more times weekly had a 27% lower risk of Alzheimer’s disease compared to participants who rarely or never consumed eggs.
The findings were based on more than 603,000 person-years of follow-up and relied on clinically confirmed Alzheimer’s diagnoses identified through Medicare claims records rather than self-reporting.
Researchers enrolled participants between 2002 and 2007. At the beginning of the study, individuals completed detailed food-frequency questionnaires covering more than 200 food items, including egg consumption habits.
The Adventist study population offered researchers a wide range of dietary patterns, from strict vegan diets to omnivorous eating habits.
Investigators adjusted statistical models for multiple potential confounding variables, including age, sex, race, education, smoking status, physical activity, and preexisting health conditions such as diabetes, hypertension, and heart disease.
The average follow-up period lasted 15.3 years.
Researchers identified a dose-response relationship between egg consumption and Alzheimer’s risk reduction.
Compared to participants who rarely consumed eggs, individuals eating eggs one to three times monthly demonstrated a 17% lower Alzheimer’s risk. Those consuming eggs once weekly also showed a 17% reduction, while two to four servings weekly corresponded with a 20% lower risk.
Participants consuming eggs five or more times per week experienced the largest reduction at 27%.
A continuous statistical analysis using approximately one egg weekly as the baseline found that participants consuming no eggs at all faced a 22% higher Alzheimer’s risk.
Researchers reported that the findings remained consistent even after excluding vegan participants and conducting substitution analyses replacing eggs with nuts, seeds, or beans.
The study authors pointed to several nutrients concentrated in eggs that may help explain the association with improved brain health.
Eggs are among the richest dietary sources of choline, a nutrient essential for production of acetylcholine, a neurotransmitter heavily involved in memory and cognitive function.
The study referenced work by Joseph Mercola discussing choline’s importance for neurological health.
Eggs also contain docosahexaenoic acid, or DHA, an omega-3 fatty acid critical for maintaining brain cell structure and function, as well as vitamin B12, deficiencies of which have been associated with neurological decline and dementia-related risk factors.
Alan Logan, author of The Brain Diet, previously noted that omega-3-enriched eggs may help reduce low-grade inflammation and support blood sugar regulation.
Researchers additionally highlighted lutein and zeaxanthin — antioxidant pigments found in eggs that accumulate in brain tissue and have been linked to improved cognitive performance.
Concerns about dietary cholesterol from eggs have also softened in recent years.
The study referenced work by Julie Miller Jones in “Cholesterol and Eggs: Pros and Cons,” which concluded moderate egg consumption generally does not negatively impact heart health when incorporated into balanced diets.
The researchers emphasized that the study remains observational and does not prove eggs directly prevent Alzheimer’s disease.
They acknowledged the possibility that other lifestyle or dietary factors may contribute to the observed associations.
The study also noted that dietary intake was measured only once at enrollment, although roughly 74% of participants maintained consistent egg consumption patterns during later follow-up evaluations conducted about a decade afterward.
Researchers disclosed the study received partial funding from the American Egg Board, though they stated the organization played no role in the design, analysis, or interpretation of the findings.
The Adventist study population’s generally healthier lifestyle habits may additionally limit how broadly the findings apply to the wider U.S. population.
Approximately 80% of participants, for example, reported never smoking.
Researchers also acknowledged that the highest egg-consumption category contained a relatively small number of participants compared to other groups.
Despite those limitations, the authors concluded that the study’s large sample size, lengthy follow-up period, and clinically verified Alzheimer’s diagnoses strengthen the findings.
The researchers said additional studies are needed to determine whether eggs directly reduce Alzheimer’s risk or whether other associated lifestyle factors contribute to the lower incidence observed among frequent egg consumers.
Jean Carper, author of Your Miracle Brain, has similarly emphasized the role of nutrition, blood pressure management, and homocysteine control in preserving long-term cognitive health.
Source: Natural News
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