When participants rated their perceptions of Mike as a salesman, the bearded version always scored highest: 10.6% higher for expertise when compared with the clean-shaven version and 11.6% higher for trustworthiness.
In a similar study, she had Mr. Mittal (called “Mike” in the test) shave his beard using standard razor lengths. The versions with facial hair scored 5.65 on a scale of one to seven for expertise and knowledge, compared with 5.12 for the clean-shaven image.
When this topic was originally posted, ~8 years ago, I didn't have a beard. I do have a beard now and I don't know that anyone trusts me more. In fact, I feel the opposite might be true. But then again, maybe I'm just not trustworthy.