Effective weight loss.

 Effective crash diet and effective sustained nutrition.

Tim Ferriss's Slow Carb diet where he claims you can lose 20 pounds of fat in 30 days.  Here is a summary of the diet.
https://tim.blog/2007/04/06/how-to-lose-20-lbs-of-fat-in-30-days-without-doing-any-exercise/

The Nutrarian philosophy speaks the most to me. Not total vegan, but focus on the very healthiest foods most of the time.
https://www.drfuhrman.com/

The end of the dieting story is whatever works for YOU is the thing you should do. But for me, it's taking a lot of trial and error to figure out what works for me.