Depending on who you are and what lifestyle you live, doing some form of intermittent fasting is objectively the best "diet" you can go on, simply because you reduce your total intake of food rather than restricting yourself to certain types of food.
I've had success doing it prior when I was at my heaviest two years ago (170 lbs/77 kgs), getting down to 140 lbs/63.5 kgs; doing it again now, with the goal of getting to either 125 or 130 pounds. This isn't me knocking keto or any other kind of diet that isn't WHOLLY bullshit, but fasting hasn't failed me or anyone who's done it (unless they're diabetic, lul).