Brookhaven dentist Don Doty has gone viral on Facebook.

A post from the dentist on Thursday has racked up more than 1 million views and more than 3,000 comments. The video has been shared more than 22,000 times.

Doty’s video is a personal testimony about a whitening toothpaste, which he describes as abrasive. He speaks directly into the camera for about two minutes and describes the product.

The comments on the video are interesting. Some dentists weighed in to say that the product, Ap-24, was safe. Other commenters who sell the toothpaste disagreed with his opinion.

See the video here.