As I have already written to you in the past, although the idea that having more meals a day can increase metabolism is wrong and despite the idea that intermittent fasting makes you lose weight, the frequency of daily meals is totally subjective: there are those who can feel comfortable eating two meals a day, skipping breakfast; who has lost a lot of weight by eating only one meal a day, in the style of the “warrior’s diet”; and those who say that the key to weight loss , or fat loss, consists in increasing the metabolism through a technique, if we can call it so, of ” consistent eating “.
The person who says this is called Billy Craig : independent researcher, health coach and trainer,Billy is known on the web for having conducted a singular experiment on himself a few years ago. 

In fact, he ate for 6000 calories a day (more than double his energy needs) every day for about a year, essentially based on these intuitions:
– to increase the metabolism you need to eat more
– a good idea could be “training the metabolism “by eating a little more a little at a time (something similar to reverse dieting), if you come from a history of continuous diets and low metabolism
– if you eat less, your metabolism decreases, and the body holds tight its reserves of fat

– even in conditions of any nutritional deficiency, the metabolism is lowered: therefore those who eat poorly gain weight not only from an excess of calories that the body does not burn, but also because they carry nutritional deficiencies
– the periods of restriction and binges typical of those on a chronic diet are bad
So what did you do?
Billy ate all the time , except when he went to sleep. For a total of 6000 calories per day. To those who follow him, Billy teaches him to eat more (his was an extreme experiment, not so much more) and to train less and intelligently to have a high metabolism and optimal health. In fact, one thing that Billy Craig insists on a lot in his blog is the scourge of the low-calorie diet.

The experiment he did on himself had the desired effects, perhaps too much: by eating constantly and getting his body used to always having the same caloric surplus, Billy lost a lot of body fat . So much, that people advised him to eat more.
That is, the result of his experiment was to lose weight , raise the metabolism by burning much more, also due to an increase in postprandial thermogenesis and NEAT .

To people who want to imitate consistent eating to boost metabolism , Billy suggests starting by eating exactly for their energy needs (so not imitating his extreme experiment, but not cutting calories anymore), trying, if it works, to increase little by little one’s energy needs with the foresight to make a nutritious diet and eat often (from what I understand Billy follows the Ray Peat -style diet , with some divergences), and be constant: no drastic cuts, no reduction carbohydrates, no overtraining.
To find out more about his experiment, here.