take (something) with a grain of salt

[A skeptical attitude] to understand that something is likely to be untrue or incorrect:

• I’ve seen the article, which I take with a grain of salt. 
• Kate tells some great stories, but we take what she says with a grain of salt because she has quite a vivid imagination and tends to exaggerate.
• I took anything he said with a grain of salt. He had a habit of exaggerating things.
• Before elections, all parties make a lot of promises. They are best taken with a grain of salt. 
• I’ve heard some reports of his achievements, but I take it with a grain of salt. 
• The reports painting a rosy scenario of the current economic condition are to be taken with a grain of salt.