Meaning of the word "be on a special diet" in English

What does "be on a special diet" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

be on a special diet

US /bi ɑn eɪ ˈspeʃ.əl ˈdaɪ.ət/
UK /bi ɒn ə ˈspeʃ.əl ˈdaɪ.ət/
"be on a special diet" picture

Idiom

to eat only particular foods, often for health reasons or to lose weight

Example:
I can't eat cake because I am on a special diet.
The doctor said he needs to be on a special diet to lower his blood pressure.