When you haven’t eaten in ages, what is that acidic taste in your mouth?

Question: When you haven't eaten in ages, what is that acidic taste in your mouth?
- Keywords:
  acidic,
  eaten,
  food,
  mouth,
  taste
Asked by ellie360 to Eoin on 14 Mar 2011.
- Eoin Lettice answered on 14 Mar 2011:
  
  Hi Ellie,
  
  When you haven’t eaten in a while, the body starts to break down fats and produce what are called ketones. This can lead to a strange taste on you breath and might be what you’re referring to?
  I’m not a medical doctor though so couldn’t be sure!
  
  Eoin.

Question: When you haven't eaten in ages, what is that acidic taste in your mouth?