You may have heard it: If you habitually sleep on your left, you may get more wrinkles on your left.

Before you fret over your sleep position, read on. According to a new study conducted by Michigan-based plastic surgeon, Dr. Brett Kotlus, there is there is no correlation between sleeping on your face and the appearance of wrinkles.

Sleeping On Side Cause Wrinkles

The research, titled “The Effect of Sleep Position on Perceived Facial Aging,” polls 100 women on their preferred sleep position and then an independent expert observer looks at their frontal images to identify the side with more wrinkles.

The result?

There’s no correlation between the side you sleep on and the appearance of wrinkles.

However, prior to the study by Dr. Brett, New York dermatologist Dr. Debra Jaliman, had advised that the way you sleep does affect where your wrinkles form. Dr. Jaliman said, “If you crunch your face against a pillow you can get them.”

Dr. Jaliman advises using satin instead of cotton pillowcases because your face slides against satin and doesn’t crunch against it.

Actually, a few aesthetics doctors that Daily Vanity has spoken with on a casual basis have also mentioned that the side that you sleep on can cause “sleep lines”, which are lines that formed because of long period of exerting pressure on one side of your face, typically because of the way you sleep. As such, the doctors that we’ve chatted with suggested that you should sleep on your back instead, to ensure that pressure is distributed evenly and your facial contours can remain symmetrical (a yardstick of beauty).

Do you have a habitual sleep position? Do you find the side you sleep on more wrinkles than the other?