Eating eggs weekly may reduce Alzheimer’s risk, researchers find
A new study published in The Journal of Nutrition reveals that eating just one egg per week is associated with a significantly lower risk of developing Alzheimer’s disease. According to researchers, older adults who consumed at least one egg per week had a 47% reduced risk of Alzheimer’s compared to those who ate eggs less than once a month. The findings point to choline and omega-3 fatty acids, abundant in eggs, as key nutrients supporting brain health and cognitive resilience.
Study design and key findings
The study followed 1,024 older adults (average age: 81.4 years) living in retirement facilities in Illinois. Over an average follow-up period of 6.7 years, more than a quarter developed Alzheimer’s. However, egg consumers saw nearly half the risk, according to the analysis.
In a separate phase, researchers examined brain autopsies from 578 participants. Those who regularly ate eggs showed lower accumulation of amyloid plaques and tau proteins, the hallmark biological signs of Alzheimer’s disease.
These findings support earlier research linking moderate choline intake with cognitive benefits, but they also introduce a synergistic effect with omega-3 fatty acids—another neuroprotective nutrient found in egg yolks.
Why eggs may help protect against Alzheimer’s
Eggs are one of the richest dietary sources of choline, a nutrient vital for producing the neurotransmitter acetylcholine, maintaining cell membranes, and supporting memory and learning through gene regulation. While the body produces choline naturally, it cannot make enough to meet daily needs—making dietary sources essential.
Eggs also contain omega-3 fatty acids, particularly DHA, known to support cognitive function in aging. This dual nutrient profile may work together to slow down or prevent neurodegeneration, as explained by Christopher U. Missling, PhD, CEO of Anavex Life Sciences:
“About 39–40% of the protective effect was explained by higher dietary choline intake. Egg yolks also contain omega-3 fatty acids, which have known neuroprotective properties. The combination of choline and omega-3s may be particularly beneficial for brain health.”
A nutrient-dense, senior-friendly superfood
Maddie Gallivan, RD, a registered dietitian uninvolved in the study, added that eggs are not only nutritious but practical:
“Eggs are often a go-to food for older adults. They’re soft in texture, quick to prepare, and packed with key nutrients—so it’s great to see how they may support cognitive health in later life.”
Considerations and limitations
While promising, the study has certain limitations:
- Self-reported food frequency questionnaires may involve recall bias
- Study participants were older U.S. adults, limiting generalizability to other populations
- The 6.7-year follow-up may be too short to establish long-term causality
Despite these limitations, researchers assert that the findings—if replicated—could shape low-cost, public health strategies to help prevent Alzheimer’s disease.
Enjoy eggs in moderation
Though eggs have faced controversy in the past due to cholesterol concerns, modern research has largely debunked dietary cholesterol as a major risk factor for heart disease. Today, nutrition experts view eggs as a nutrient-dense part of a balanced diet, especially compared to ultra-processed, low-fat alternatives.
If you enjoy eggs, there’s now more reason to keep them in your routine. They may not only support healthy aging but also offer protection against neurodegeneration, thanks to their unique nutrient composition.
Stay informed. Stay ahead.
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