Mayo Clinic Minute: 3 things you might not know about sunscreen

Sunscreen. Most everyone knows that putting it on means you will be …

But Dr. Dawn Davis says there are three things many people don't know about sunscreen. No 1: …

"… Expiration dates on sunscreen bottles are legitimate. And you don’t want to spend money on sunscreen only to find that you picked an expiration date that’s coming up very soon, and then the bottle will be ineffective or wasted. It's just like looking for produce at the grocery store."

No. 2: Don't expose your sunscreen to extreme heat or cold.