According to WebMD, the loss of 30 pounds in two months would not be healthy and should not be attempted. A healthy rate of weight loss is 1-2 pounds per week, therefore a good expectation for weight loss in two months is approximately 8-16 pounds.
According to WebMD, 3,500 calories are equal to 1 pound of body fat. To lose weight, a person must create a calorie deficit (a difference between the number of calories consumed and calories burned). It is important to remember that eating too little can be dangerous; eating less than 1,050-1,200 calories per day slows the metabolism and is unhealthy for the body's organs. Likewise, rapid weight loss also brings health risks.
The human body needs a certain amount of calories every day to maintain basic bodily functions like breathing, brain activity and organ function, notes WebMD. Beyond this necessary minimum, the body also needs calories to fuel activities such as walking, talking, cleaning, taking the garbage out and other basic activities done during the day. These two numbers combined show how many calories the body needs every day to maintain its current weight. Eating less calories than burned causes weight loss and eating more than burned causes weight gain. Activities such as walking, running, strength training and other forms of exercise burn calories. It is also important to drink lots of water and limit sodium consumption, which can cause water retention. Above all, it is important to be patient when attempting weight loss and remember that true, healthy results come from lasting change, not fad diets or quick fixes.