New research reveals that consuming eggs just twice a week can lower the risk of Alzheimer's disease by at least 20 percent. The benefits are even more pronounced for those who eat eggs five times a week or more, with risk reductions exceeding a quarter.
Nutrients in Eggs Protect the Brain
Scientists believe that nutrients found in eggs help shield the brain from the ravages of Alzheimer's. They now recommend regular egg consumption as part of a balanced diet to ward off Alzheimer's and other forms of dementia. In the UK, an estimated one million people live with dementia.
The study, conducted by researchers at Loma Linda University in California, tracked nearly 40,000 men and women over 15 years. Results showed that those who ate eggs once or twice a month were 17 percent less likely to develop incurable dementia compared to those who never ate eggs. Among those consuming eggs two to four times weekly, the risk reduction was 20 percent, and for five or more times a week, it reached 27 percent, according to findings published in the Journal of Nutrition.
Key Nutrients: Choline and Vitamin B12
Eggs are packed with choline, a nutrient essential for producing acetylcholine, which is vital for healthy brain cells and memory function. They are also rich in vitamin B12, crucial for cognitive function. A single egg provides a quarter of the body's daily vitamin B12 needs.
Despite past concerns about cholesterol, the British Heart Foundation states that eating at least one egg a day is safe.
Broader Lifestyle Changes to Reduce Dementia Risk
While a cure remains elusive, prevention is increasingly seen as a key defence. The Lancet Commission's 2024 report concluded that nearly half of all dementia cases globally could be prevented or delayed by addressing 14 risk factors, including smoking, excessive alcohol, loneliness, and sedentary lifestyle.
Check Blood Pressure and Cholesterol
Untreated high blood pressure damages brain blood vessels and is a major driver of dementia. A 2025 study found that treating high blood pressure with medication reduced dementia risk by 15 percent. Similarly, healthy LDL cholesterol levels (below 1.8 mmol/L) lowered Alzheimer's risk by 28 percent.
Regular Sauna Use
A Finnish study found that middle-aged men using saunas two to three times weekly had a 22 percent lower dementia risk, and those using them four to seven times weekly had a 65 percent lower risk. Heat shock proteins released during sauna use may help untangle brain plaques.
Social Interaction and Volunteering
Regular social interaction reduces dementia risk by an average of 38 percent, according to a 2025 study. Volunteering, playing bingo, or dining with friends strengthens neural circuits. The least socially active older adults developed dementia five years earlier than the most socially active.
Reading and Mental Stimulation
Reading regularly reduces dementia risk by 40 percent, according to a Rush University study. Writing diaries, learning a foreign language, or visiting museums also stimulate the brain and prevent shrinkage.
Optimism and Gratitude
Harvard research found that optimistic people had a 15 percent lower dementia risk. Keeping a gratitude list can help cultivate positivity.
Catch Up on Sleep
Getting less than six hours of sleep regularly increases dementia risk by up to 30 percent. However, catching up on sleep at weekends can reduce risk by up to 70 percent, likely by reducing brain inflammation.
Oral Hygiene and Vaccinations
Gum disease increases dementia risk due to brain inflammation. Annual flu jabs for six consecutive years reduced dementia risk by 14 percent, and the shingles vaccine Shingrix cut risk by 17 percent.
Hearing and Vision Checks
Hearing loss raises dementia risk by up to 22 percent, while uncorrected vision loss increases risk by 50 percent. Cataract surgery can reduce risk by 30 percent.
Strength Training
Aerobic exercise is known to protect against dementia, but strength training twice a week improved memory and recall in older adults with mild cognitive impairment, reducing brain shrinkage linked to Alzheimer's.
