Challenges
© Dotdash Meredith. All rights reserved. Used with permission.
Yes, there's a difference — and a clear winner.
More From Staying Sharp

Eat Right
Tips and Tricks to Sneak in the Veggies

Eat Right
The Link Between Citrus and Brain Health

Eat Right
You’ve reached content that’s exclusive to AARP members.
To continue, you’ll need to become an AARP member. Join now, and you’ll have access to all the great content and features in Staying Sharp, plus more AARP member benefits.
Join AARPAlready a member? Login
Privacy Policy Terms of Service Legal Disclaimer