According to a McCann Truth Central survey, 42 percent of consumers ages 18 and above believe they are.
Still, the number points to a potential growing trust problems among consumers.
These findings are a contrast to the findings of a recent YouGov survey that found that ads are more honest. In that survey, 61 percent of consumers said they were encountering honest ads, compared to 50 percent in 2014.
The McCann study found a declining trust in politicians, as well—70 percent of respondents said they did not trust them.
The study also took a look at the way liberals and conservatives view brands and U.S. institutions. For instance, NASA is the most-trusted federal organization overall, while conservatives picked the U.S. Army as their top choice and liberals chose the Centers for Disease Control and Prevention.