[take] {sth} with a grain of salt

to only accept a part of something or not take it seriously at all

The idiom "take something with a grain of salt" has its origins in ancient Roman and Greek traditions. The phrase was first recorded by the Roman author Pliny the Elder in his work "Naturalis Historia" and is derived from the Latin expression "cum grano salis." It suggests approaching information or claims with skepticism and not believing everything at face value.

When reading online reviews, it's essential to take them with a grain of salt, as some may not be genuine.
The tabloid's sensational headlines should be taken with a grain of salt; they often exaggerate stories.
He tends to exaggerate his accomplishments, so I always take his claims with a grain of salt.
When a rumor spreads, it's a good idea to take it with a grain of salt until you can verify the information.
The scientist's groundbreaking discovery should not be taken with a grain of salt; it has been thoroughly tested and confirmed by multiple experts.