This is a lifestyle.
The mentality of this "diet" (eating habit) is based on the understand of where we come from: nature. In nature, flour is not readily available, and neither is refined sugars. The goal is to eat as close as possible to our tribal ancestors, and any time we leave the realms of the tarzan diet, we do it CONSCIOUSLY. It's ok to have a slice of bread now and then, as long as we remind ourselves that we are "cheating" and ensure that we only do it a limited amount of times during the day.
The factors at play here are WHAT are we eating, the QUANTITY of foods, and WHEN we are eating them.
WHAT: the goal is natural veggies, fruits, meats, eggs, nuts & seeds organic when possible. Brevages are not allowed, except for teas and coffee (low sugar) which have benefits and are natural.
QUANTITY: think about how much energy your body expends on a daily basis, and eat your calories accordingly. How active you are (daily chores, work, walking, workouts, sex) is very important to consider. Be realistic. Split your macros roughly around 40% protein, 30% fats (mostly good) & 30% carbs (mostly complex or simple if around workout).
WHEN: focus on proper food intake around your workouts, avoid eating a few hours before bedtime, perform intermittent fasting to free yourself from constant hunger binges. This is required to suppress your ghrelin levels. An example of intermittent fasting is the last meal is at 8pm at night, and you don't eat until the next day at noon for a total fasting time of 14 hours. My first meal is normally my pre-workout meal so for example it may consist of oatmeal (complex carbs), egg whites (proteins) & a few nuts (good fats).