Tale of the Tape

To take your facial fingerprint, pull out a roll of Scotch tape. Make sure your face is clean (without makeup, sunscreen, moisturizer, or peanut butter for at least 2 hours). Place a piece of tape vertically on the middle of your forehead, from your scalp to the area between your eyebrows. Remove it and replace it first on the outside corners of your eyes, then across the apple of each cheek, and last above your lip. Press gently in each spot, leave it for a few seconds, and then carefully lift it off. Check the tape for lines and flakiness.

If your tape is completely smooth: You have the skin of a typical 30-year-old.

If you see flakes but no lines: You have the skin of a typical 40-year-old.

If you see flakes and small lines: You have the skin of a typical 50-year-old.

For a more accurate read on the health of your skin, take the SkinAge Test.

Plus, find out what to put on your plate: Read "Top 5 Foods for Beautiful Skin" at our partner site, HowStuffWorks.com.