It’s keto breath, it comes from your lungs, nothing you can do about it except not be in ketosis (ie not fast and eat carbs) .
Anyone that tells you to brush more, rinse more, scrape your tongue more, doesn’t know what they’re talking about.
I’m in day 11 of 40, I feel you! It’s so hard to drink water, I have to sip very small amounts to bypass the horrible taste. I’ve also been thinking about a cup I can spit in but it hasn’t been that bad yet. Either way, what makes bearable for me is oil pulling every morning. You won’t get rid of it but it will definitely make it easier on you.
Just buy some coconut oil and gargle it for 20min every morning. Rinse your mouth properly and brush your teeth.
Congrats on reaching the deep ketosis point.I had this also after day 5 but day 8 it became unbearable and I stopped.In my case it tasted like something died in my mouth and only thing that helped for a bit was shots of acv.