I will interject here that a lot of fad diet info is easily available, complete with faux science to boost book sales. Proceed with caution. Short term weight gain is possible, certainly, but long-term over-consumption of animal protein and suppression of complex carbohydrates is a virtual recipe for cancer. Plus, your brain cannot operate w/o fuel, and that's built from the carbs.

I will grant you that it's theoretically possible to transmute anything into what you need, but it's a lot of work and few are equipped with the necessary info and focus. Easier to eat properly. It's actually easier to live w/o food than to transmute everything.