Nutrition science can be confusing with so many opposing studies and opinions, but really we need to find the right "diet" that allows us to find that balance between eating healthy whole foods and living in reality -- where many of us do not have time to prep food and cook every night.
Somewhere in between is plain old common sense -- the best "diet" is the one that works for us. For some of us it might be low carb and higher protein, for others reducing portion size works better. Rather than spending time counting calories, we need to focus on eating real whole foods that can best fuel our bodies and keep processed foods, added sugar, corn fed beef, and other less "natural" foods to a minimum.
This is easier said than done, and while I am not a fan of fad diets, or really any "diet" per se, I do think that healthy cleanse or short-term clean diet is a good idea for some who need a jump start to a healthier lifestyle. They can help to stabilize blood sugar while resetting tastebuds so you can appreciate the flavor of real food and reduce cravings for processed foods and sugar. There are a couple I can recommend put together by respectable experts: