Comment by Joy Manning

The study has some important limitations. Because it’s observational, it can show an association between eating eggs and lower Alzheimer’s risk, but it can't prove eggs directly caused the reduction. Diet was assessed only once at the start, so changes over time weren’t captured. And because participants were largely white, older and health-conscious, the findings may not apply equally to everyone. The researchers also acknowledged that despite extensive statistical adjustments, other unmeasured factors could still play a role.