I have looked high and low, but nearly every “sugar free” breath mint on the market either has, instead, has either Xylitol or Sorbitol ! …which can have 2/3rds as many carb cals straight table sugar. Because of this, most of these mints contain 1 carb, or more. Now I know that 1 carb doesn’t seem significant, but I know I could easily eat 20 of them in a full day of driving, and be at my 20 gm per day limit on carbs… And I have not even eaten any real food yet !
I swear I’m fixing to try to make my own breath mints… I’d use mostly peppermint oil, and Sucralose ! Bam ! That would be a real Keto breath mint !
BTW, on the weekends, I drive a TON with passengers (ride share) and I really don’t eat much (fasting) so my breath tends to get rough, at the worst time and place for bad breath 
Brainstorm…
lol
Lol

no such luck in the UK! I like a pack in my pocket on a 12 1/2 hour shift or in my bag.
so I found about a half bottle (1oz) of this stuff in my GF’s cabinet…