Good for you for wanting to quit!!!

I quit 5 years ago using the stepdown patches, and was quite successful with them. You still have some withdrawal with each new level of nicotine, but you skip those nasty bad cravings and the feeling of being out of control.

As for quitting while on low-carb, I don't know. I personally can only handle one big lifestyle change at a time. Good luck to you, whatever your decision-