Does anyone lose wt. eating 1200 calories or less?

it is different for different people, but think about this long term. Can your body sustain itself on that few calories forever? Not likely and you are likely missing out on valuable vitamins and minerals that you need. If you feel comfortable in doing this, than okay, but I don't see why someone would choose to do it.

This is a weight loss phase for most, not the rest of their lives. It's as easy to get vitamins and minerals in 1200 calories as more.

Dieters always fear this horrible starvation myth. No one seems to fear the 'death by overeating' nearly as much. Our bodies have excess stored fat which can be used as energy, just like food calories can. That's biologically what it's for. We're made to use it up as needed. To burn it off, you create a deficit. More deficit = faster weight loss. Starvation mode is a myth. People do better without psychological starvation fears and feelings of deprivation that come from very low caloric intake. But their bodies and their metabolisms are fine. It's far better for your health to do what you have to do to get the excess weight off once and for all than to worry about meeting some mythical caloric minimum, in my opinion.

Think about the term 'essential fatty acids'. They're called essential because your body can't synthesize them from other compounds, such as stored calories in the form of body fat. They're a tiny portion of our nutritional needs. The rest, the body can synthesize from the compounds in the foods we eat and our stored fat. Eating a balanced diet is good for various reasons but for basic calorie metabolism, you can burn anything that makes a calorie, including your body fat.