I see a few people commenting on bile... This may seem silly but, what is it and how is it related to smoking?
Bile is made by your liver and released into your digestive system by your gallbladder. It helps digest things. Too much can give you the trots, though.
Tasting something bitter causes extra release according to a lot of herbalists. "Liver tonics" sometimes work by just being bitter, though there are other kinds of herbs for liver healing, which are unrelated.
So smokers (and coffee drinkers if their coffee is nasty-enough) get extra bile from the bitter taste after the meal, and the body eventually compensates by releasing LESS during the meal than a non-smoker would get. So when we quit smoking, unless we always have something really bitter after a meal, we go through a phase where we are not getting enough. So temporarily having a bitter "digestif" after a meal, then tapering it off, can help with quit-smoking-indigestion which some smokers get.
If you always have bitter coffee or bitters after a meal anyway, or if you tended to not always smoke right after meals, then this would not be relevant -- the purpose is to replace the digestive stimulation of the after-meal cigarette with something that is not an analog but is still bitter, that you can taper off at your convenience.
If you are not noticing any indigestion then forget the whole thing.
And, veggies and water are a big help anyway, both with smoking cessation AND with the dehydration we vapers seem to get. (Why?????)