I may, as is usual for me, just be missing sarcasm and answering to a rhetorical post. I can't see the expression on your face and so need to take what you say on face-less value, and hence believe you are being sincere.
That seems like a lot of work
@Diogenese, does it have the ability to be tailored to the individual needs of the user, weight, height age, gender, etc.? And especially does it cater for people with chronic illness and allergies? Or is it just for yourself? I already have two, free, android apps that do that for me, so you may have wasted a lot of effort and time.
A lifestyle change to a restrictive diet could very well deplete essential nutrient. Of that there is now doubt. But interestingly, this is not the case for extended fasts. Plus an extended fast does have an end.
Even with an extended fast of more than say 7 days, you just need to make sure you get enough electrolytes - Magnesium, Potassium and Sodium. No vitamin supplements are needed, just these essential salts that cannot be replaced from stores in the body. And no, a 7 day fast is not excessive, our bodies thrive under that condition.
WRT wine—I enjoy a drink as with many of you. I could easily drink to excess, and drink every day, but chose not to. No matter how you look at it, alcohol is toxic to the liver and each regular glass of wine contains about 130cal. And all wines contain carbs. But in moderation, yes, most restrictive diets can handle a few glasses of wine. Type is important though. Best are dry varieties.
Certain spirits are better for carb counting, but potentially worse for the liver due to more alcohol. Zero carb, low cal beers are fine too. But even these do have calories. And hence can't be consumed on a fast—only water and black, unsweetened tea or coffee, and clear broths if you are desperate (such as bone broth).
