If it's just weight loss, and pizza doesn't send you into a pizza frenzy--heresy of heresy on a low carb board, I think you might lose weight just fine. People are different. But it won't be keto.

I have a tight definition of ketogenic that insists on blood ketones (or at least probability of blood ketones) being elevated. I'm bipolar, and while a slightly low carb works fine for me for weight loss and maintenance, I also get anxiety/mood improvements that seem to require tighter control--for both carbs and protein.

For some reason people are always talking about how urine ketones are useless. They aren't--the correlation with blood ketones is about as good as it is for ketonix. But for some reason, breath acetone gets a pass.