Eating Eggs Regularly Reduces Alzheimer’s Disease Risk

Researchers tracked astir 40,000 older adults for 15 years and recovered that group who consumed eggs moderately developed Alzheimer’s illness little often than non-consumers.

Study: Egg Intake and nan Incidence of Alzheimer’s Disease successful nan Adventist Health Study-2 Cohort Linked pinch Medicare Data. Image credit: tyasindayanti/Shutterstock.com

A caller Journal of Nutrition study investigated nan narration betwixt ovum depletion and nan incidence of Alzheimer’s disease.

Alzheimer’s Disease: Prevalence, Risk Factors, and Dietary Considerations

Alzheimer’s illness is simply a progressive neurodegenerative upset marked by amyloid-β plaque accumulation, neurofibrillary tangles, and neuronal loss, resulting successful cognitive diminution and death. It is nan sixth starring origin of decease successful nan United States, pinch projected nationalist guidance costs exceeding $600 cardinal annually by 2050.

Alzheimer’s illness etiology involves genetic, vascular, and biology factors, notably diet. Due to nan deficiency of curative treatments and constricted pharmacological efficacy, prevention targeting modifiable consequence factors is critical. Previous investigation indicated higher dementia mortality among vegetarians compared to non-vegetarians, contempt reduced all-cause and different cause-specific mortalities pinch vegetarian diets.

Recent studies bespeak ovum depletion whitethorn beryllium associated pinch Alzheimer’s illness risk, pinch mean intake linked to a 10 % simplification successful neurodegenerative mortality. However, astir studies are constricted by creation flaws, inconsistent dietary assessment, deficiency of biomarker validation, and inadequate accommodation for confounders, underscoring nan request for rigorous investigation.

Investigating nan effect of ovum depletion connected Alzheimer’s illness risk

The existent study exploited nan Adventist Health Study-2 (AHS-2) cohort to analyse nan narration betwixt ovum depletion and Alzheimer’s illness risk, drafting connected extended dietary and wellness information from complete 96,000 participants. AHS-2 information were merged pinch Medicare claims and deidentified. For this analysis, only US participants aged 65 and older were included, pinch eligibility based connected Medicare records.

A full of 39,498 participants met nan eligibility criteria. Dietary intake was measured astatine baseline pinch a validated nutrient wave questionnaire covering complete 200 items. Both wave and amount of ovum intake were recorded, including visible and hidden sources. Egg intake categories ranged from ne'er to 5 aliases much times per week, and intake was energy-adjusted.

Alzheimer’s illness incidence was wished from Medicare records, utilizing modular diagnostic codes. Only caller cases aft enrollment were counted. Cox proportional hazards models pinch attained property arsenic nan clip standard were utilized to estimate nan nexus betwixt ovum intake and Alzheimer’s risk.

To supply discourse for individual nutrient intake, 2 substitution analyses were conducted to analyse nan replacement of eggs pinch nuts/seeds and legumes, which are nutrient-dense, commonly consumed plant-based macromolecule sources successful nan cohort. These analyses examined really substituting eggs pinch replacement protein-rich foods mightiness impact nan consequence of Alzheimer’s disease.

Moderate Egg Consumption Is Associated With Reduced Alzheimer’s Disease Risk

Significant baseline differences were observed crossed ovum intake categories. The cohort had a mean property of 64 years and was 64 % female. Over 15.3 years of follow-up, 2,858 participants developed Alzheimer’s disease, pinch affected individuals much apt to person comorbidities and dietary patterns characterized by little intake of eggs, meat, and food and higher intake of fruits, grains, and nuts/seeds.

Multivariable-adjusted Cox proportional hazards models indicated that a higher wave of ovum depletion was independently associated pinch a little consequence of Alzheimer’s disease. After controlling for demographic factors, manner variables, awesome nutrient groups, and comorbidities, nan hazard ratios (HRs) for Alzheimer’s disease, comparative to ne'er aliases uncommon ovum intake, ranged from 0.83 for mean intake (1–3 times per period aliases erstwhile per week) to 0.73 for predominant intake (5 aliases much times per week).

Any level of ovum intake corresponded to a 17 %–27 % little comparative hazard of Alzheimer’s illness compared to nary ovum intake. This inverse narration persisted aft progressive accommodation for imaginable confounders.

Analysis of those consuming 1 aliases much eggs per time showed an HR of 0.74 compared to uncommon aliases nary intake, but nan mini sample size constricted statistical power. The study besides noted that nan highest intake class reflected wave of depletion alternatively than precise regular ovum counts. No important relationship betwixt activity aliases race/ethnicity and result was detected. The usage of attained property arsenic nan clip adaptable accounted for age-related risk.

Sensitivity study excluding vegans produced results accordant pinch nan superior analysis, demonstrating a akin simplification successful Alzheimer’s illness consequence astatine higher ovum intake frequencies.

Restricted cubic spline study showed a nonlinear inverse narration betwixt ovum intake and Alzheimer’s illness risk; non-consumers had a importantly higher risk than participants consuming astir 1 ovum per week, pinch an HR of 1.22 relative to those consuming astir 1 ovum per week. Additional ovum intake further reduced risk, though not significantly. Analyses comparing eggs pinch different protein-rich foods, specified arsenic legumes and nuts/seeds, produced broadly akin associations pinch Alzheimer’s illness risk.

Findings support imaginable brain-health domiciled for eggs

The existent study suggests that mean ovum depletion whitethorn beryllium linked to a reduced consequence of Alzheimer’s illness successful older adults, adding to grounds that fare whitethorn play a domiciled successful encephalon wellness and supporting further investigation into nan imaginable domiciled of egg-derived nutrients successful cognitive health.

The authors projected respective imaginable mechanisms that could explicate this association, including nutrients recovered successful eggs specified arsenic choline, DHA, lutein, zeaxanthin, phospholipids, and vitamin B12, though these mechanisms were not straight tested successful nan study.

Despite these cardinal observations, this study has respective limitations, including residual confounding that cannot beryllium afloat excluded owed to nan observational creation and dietary intake measured only astatine baseline, which whitethorn not seizure changes complete time. Furthermore, reliance connected Medicare information whitethorn lead to missing milder aliases undiagnosed Alzheimer’s cases. The authors besides noted nan anticipation of reverse causation, successful which preclinical Alzheimer’s illness could power dietary habits earlier diagnosis, though they based on that dietary patterns successful this cohort were mostly unchangeable complete time. In addition, because decease tin hap earlier Alzheimer’s test successful older adults, nan reported hazard ratios should not beryllium interpreted arsenic nonstop measures of absolute illness risk.

Importantly, nan study organization consisted of a comparatively health-conscious Seventh-day Adventist cohort pinch debased rates of smoking and intoxicant usage and mostly little ovum depletion than nan broader US population, which whitethorn limit nan generalizability of nan findings.

Further investigation should research divers populations, semipermanent dietary patterns, and nan effects of circumstantial egg-derived nutrients. In addition, nan underlying mechanisms of eggs' neuroprotective effects must beryllium explained.

The study was supported by an investigator-initiated assistance from nan American Egg Board, though nan authors stated that nan funder had nary domiciled successful study design, information analysis, interpretation, manuscript preparation, aliases publication decisions.

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