go on a balanced diet

[joham]

Do native people say 'go on a balanced diet' as in:
Try to go on a balanced diet with a small amount of healthy fats, ...

And do native people say 'attend an exam' which means 'take/sit an exam'?

Thank you in advance.

 

[Barb_D]

In the US, we say "eat a balanced diet" and we "take" exams.