Eggs may protect brain function and help regulate homocysteine levels in adults over 60, according to cardiologist Aurelio Rojas. Rojas points to research involving nearly 40,000 people to argue that eating eggs five times a week offers cognitive benefits without raising cholesterol levels.
How Egg Yolks Affect Brain Health
The nutrients required for neurological protection are concentrated in the yolk, according to Rojas. He identifies the control of homocysteine—an amino acid in the blood—as a primary benefit of egg consumption for older populations.
The egg yolk is where the nutrients that protect the brain are concentrated.
Aurelio Rojas, cardiologist
High levels of homocysteine are often associated with an increased risk of cardiovascular disease and cognitive decline. Rojas suggests that the specific nutritional profile of eggs helps manage these levels, contributing to better brain health in seniors.
The Relationship Between Eggs and Cholesterol
Rojas disputes the long-standing medical narrative that egg consumption increases blood cholesterol. To support this, he cites a study of nearly 40,000 participants that tracked the effects of regular egg intake.

Key findings from the cited research include:
- Frequency: Benefits were observed in individuals eating eggs five times per week.
- Cholesterol: The data suggests that egg consumption does not lead to a rise in cholesterol levels.
- Brain Protection: Regular intake was linked to protective effects on the brain.
Identifying Egg Quality
Beyond the frequency of consumption, Rojas emphasizes the importance of checking the identification numbers printed on eggshells. While the specific numerical codes vary by region, these markers provide data on the production method and the origin of the egg, which Rojas indicates is an important factor for consumers to monitor.