[mdp2021]

> I'd love to know if anyone has been able to completely replace food with protein powders and vitamins, hospital liquid diet, or any other alternative. The idea here is to abstain from food for a full year and then restart eating normally with a light balanced diet with a nutritionist's help

Please, please, please: live naturally. Respect nature. You are made of nature. Treat yourself properly. If it is unnatural, do not do it. You take an award for having introduced to our collective mind the unthinkable concept, «abstain from food for a full year».

If you have strong will power, consider the game of "forcing yourself to the healthiest diet ever".

(Since you are there, consider proceeding to considering the game of "forcing yourself to the healthiest life ever". There may be a chance that it could help with the «obsessive» side and finding some better «escape valve».)

[Georgelemental]

I'm not sure "forcing yourself to the healthiest diet/lifestyle ever" is actually a good idea, because there is no one healthiest diet or lifestyle for everyone at all times that we know all the details of. IMO much better to aim for simply "healthy" or "very healthy" as a habit you stick to long-term.

[mdp2021]

Of course. The idea was presented in terms consistent with those of the poster.