I eat mac nuts all the time... but I keep it down to a max of 1/4c in a given day. They are very high in fat, which makes them high calorie as well. I only had keto breath once... and that was about 2 months ago... never happened again since. But I still average from a half lb to 1lb loss a day. I don't rely on the strips or breath.. it can be deceiving.

Maybe have nuts... but in moderation.