Do you eat 1200 calories a day but still don’t lose weight?
Here is the answer from Jay, coach and personal trainer author of one of the most popular sites of recent times, also thanks to the popularity of his Instagram account, or The Workout Routine. 
I premise you that you will not like his response from him.

BECAUSE YOU EAT 1200 CALORIES A DAY BUT DON’T LOSE WEIGHT

“Millions of women,” Jay explains, “of very different weights, heights, ages and activity levels think they need to eat 1200 calories a day to lose fat. This is completely wrong.
The actual number of healthy adult women on this planet who really need to eat as low as 1200 calories per day for fat loss to occur is minimal.
And that small percentage is typically made up of women who are very short, already at a very low body weight, and sedentary.
Yet despite this, countless women who don’t fit this description claim to consume 1200 calories a day or less but don’t lose weight.

What is really happening is that the person is eating far more than the 1200 calories they think or claim they are consuming.
Here are the two most common ways this happens.

1. It is wrong to track calorie intake with incorrect calculations, underestimating how much you eat or overestimating how much you consume, etc. Which leads to eating more and burning less than they think . This is something that practically always occurs, even in many studies. In fact, one study specifically looked at people who claimed they were unable to lose weight even though they were eating less than 1200 calories a day.
   They assumed it was due to metabolic damage, but the study actually found that they were eating on average 47% more calories per day than they thought.
2. Other times the person is eating 1200 calories as they say… but only part of the time. The other part of the time he is binging enough to erase the excessive deficit he created, due to the enormous hunger caused by eating so little, so he ends up eating more on the weekend . And it happens that these mistakes cancel his sacrifices.