Is unintentional or high carb ketosis possible?

Today when I woke up, I smelled like I was in ketosis and I have not smelled during ketosis in 5 years and I did not try to lower my carb intake the night before, I just had lemon mixed with coffee which might have stimulated ketones in my body. I changed my coffee brands and this new brand seems to stimulate ketosis faster.

Is unintentional or high carb ketosis possible?
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