1200 calories is going much too low for almost any adult. The rule of thumb is you want to consume 10x your weight in calories. For example if you weigh 150 pounds then you would need 1500 calories a day. If you go below that daily calorie intake, then your body goes into starvation mode and actually starts storing more fat! Keep in mind, the 1500 calories can't be empty calories from soda, candy, chips, ect. Whole fruits and vegetables should make up a large part of your daily food intake.
I recently found out my triglyceride level was extremely high, so I had to do something drastic and I didn't want to start on medication. My level was 479 and normal is 150. I found a wonderful resource Ultra-Metabolism
by Dr. Mark Hyman. I have lost 16 pounds in 4 1/2 weeks following his whole health diet. Get this... You can even have chocolate on this diet and I've yet to feel hungry! Maybe more importantly than the pounds, I've lost most of my fat pockets! I'd be glad to answer any questions about my experience with this program.