Bad breath during a water fast?

bad breath
blackcat asked:

What causes bad breath during a water fast. I think I heard somewhere that it is caused by acetone being relesed out of your lungs, but I can’t find that answer anywhere. Thanks all in advance.
Yes water only. This is day 16 sometimes my breath is fresh and my mouth taste sweet but other times it horrible and my tongue is coated. In the morning time when if I swallow my saliva it burns my throat going down.

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