take sth with a pinch of salt

take / receive sth with a pinch of salt
take / receive sth with a grain of salt

(to doubt the truth or value of something; to be careful about believing that something is completely true) — относиться к чему-л. недоверчиво, скептически, критически, c (некоторой) долей сомнения; сомневаться, усомниться в чем-л.

Example 1: If I were you, I’d take her advice with a pinch of salt.

Example 2: You'd better take everything he says with a pinch of salt.

Related vocabulary:

From Lat. cum grano salis}