Do they have sugar or other unwanted chemicals in them? If not, don’t worry about them. Traditionally processed food is not what we worry about.
As for the fact that meat contains possibly carcinogenic nitrates, the exact same nitrates are found—and in much greater abundance—in various plants that we are encouraged to eat. Are these identical chemicals somehow not harmful in plants and somehow dangerous in meat? I don’t believe so, especially since the people telling us how dangerous the nitrates are in meat don’t want us eating meat for reasons quite apart from human health.
Dr. Westman recommends a top limit of 20 total g/day to his patients. Virta Health recommends a limit of 50 g/day total, in the hope, as Dr. Phinney says, that will keep the patients under 20 g/day net. We recommend 20 g/day, but say it’s up to you to choose total or net. Many people feel that total is not only simpler but also more healthful; many others do just fine counting net carbs.
Hard liquor is generally carbohydrate-free. Alcohol, though, is metabolised in the liver, by the same pathway that also metabolises fructose and branched-chain amino acids. That pathway is easily overwhelmed and can quite quickly lead to fatty liver disease, so be careful with your total consumption of all three.
Didn’t you ask these questions in another thread? Did you not go back to check, or were you hoping for different answers?
In any case, diet soda pop is okay, with the proviso that (a) some people react with an insulin spike to some of the non-sugar sweeteners, and (b) all diet sodas I’ve ever heard of are sweetened with aspartame, and many people consider aspartame the devil’s handiwork. If you are not among them, then have at it.