Daily Eggs Linked to 27 Percent Lower Alzheimer's Risk

Breakthrough Research Reveals Promising Connection

A groundbreaking study from Loma Linda University has uncovered compelling evidence that eating at least one egg per day for five or more days each week reduces Alzheimer's risk by up to 27% . The research, published in the Journal of Nutrition , followed 40,000 adults over 65 for an average of 15.3 years , making it one of the largest studies to examine this relationship.

What makes these findings particularly striking is that even modest egg consumption showed protective benefits, with eating eggs just 1 to 3 times per month linked to a 17% reduction in risk, while those who ate eggs 2 to 4 times per week saw about a 20% lower risk . This suggests that even small dietary changes could make a meaningful difference for brain health.

The study examined eggs consumed in visible ways—scrambled, fried, boiled, and other forms , tracking participants through Medicare records to identify physician-diagnosed cases of Alzheimer's disease. After 15 years, 2,858 people had developed Alzheimer's , providing researchers with substantial data to analyze patterns.

The Science Behind the Protection

Eggs pack a powerful nutritional punch that may explain their brain-protective effects. They are a rich source of choline, which the body uses to produce compounds such as acetylcholine and phosphatidylcholine that are essential for memory and communication between brain cells . This connection is particularly significant since deficiencies in choline have been documented in the brains of individuals with Alzheimer's disease .

Beyond choline, eggs contain lutein and zeaxanthin, carotenoids that build up in brain tissue and have been linked to better cognitive performance and lower levels of oxidative stress . The nutrient profile is rounded out by omega-3 fatty acids, with the yolk especially high in phospholipids, making up nearly 30% of total egg lipids .

Researchers believe these nutrients may act synergistically to support cognitive resilience and mitigate neurodegenerative processes . Interestingly, when scientists conducted a detailed analysis, choline accounts for roughly 39% of the potential benefit of eating eggs on Alzheimer's risk, indicating that the other nutrients in eggs might also be significant .

Important Context and Limitations

While the results are encouraging, experts urge caution in interpreting these findings. The study focused on Seventh-day Adventists, who as a group smoke less, drink less, eat more plants, and have lower baseline rates of obesity, diabetes, and cardiovascular disease than the average American . This means we're looking at what happens when people add eggs to an already protective dietary pattern .

The research also comes with financial transparency considerations, as some funding for the study came from the American Egg Board , though it had no role in the execution or publication of the study . The researchers emphasize that moderate egg consumption should be part of a balanced diet, with focus on overall health along with this knowledge about the benefit of eggs .

Looking Ahead

This study builds on previous research showing similar patterns. A 2025 study from researchers at Tufts and the Rush Alzheimer's Disease Center found that participants who ate more than one egg per week could see as much as a 47% decline in Alzheimer's risk , while a 2024 study from UC San Diego determined that egg consumption among middle-aged participants was associated with better cognitive performance in later life .

The researchers acknowledge that further research is warranted to explore this relationship in more diverse populations, evaluate whether long-term egg consumption earlier in life influences later risk, and investigate the role of specific egg-derived nutrients . As our understanding of nutrition's role in brain health continues to evolve, eggs appear to be emerging as a simple, accessible tool that might help protect cognitive function as we age.