Try it if you think it is going to work, whatever it is, low carb, hi fat whatever. You will know within a month whether it works. Simple. Franco said, if it works it works, no matter what anyone says. If you can't try something for a month and tell if it is working then you got bigger problems.
All these gurus and people with theories are trying to sell you something. When it doesn't work, they'll come up with some bullshit excuse or claim you didn't follow their instructions. Ask for a 100 percent money back guarantee. Anyone willing to give this might be on the level.
Tape measure yourself. Weigh yourself. Look at yourself in the mirror.