To achieve weight loss you need to consume less calories than you expend. Eating less can certainly help. However, when people restrict calories too much they often lose lean body mass. A loss of lean body mass is not desired because it weakens the organs and muscles, and also slows down metabolism. Research has also shown that the combination of both diet and exercise leads to much greater weight loss. Exercise also appears to be the best predictor of long-term weight management.

So, before you go restricting too many calories and eliminating certain food groups from your diet, first take a look at what improvements you can make to your eating habits. Substitute poor nutritional choices for more healthful choices. Include a wide variety of whole grains, fresh fruit and vegetables, lean protein sources, beans, and low fat dairy products. These foods will provide you with more nutrients and fewer calories than fast food options and other less healthful choices.

 

ANSWER -1
once upon a time there was a little chubby girl (me) who had 170 lbs, and decided that she needed to lose some weight, here's how she did it. this really works, and its not to crazy like starving and stuff, at one point i had 131 lbs, and now after 4 years i have 140 so its not like a yoyo diet. its pretty much 4 days that repeat themselves, small errors are ok, like if you eat a little more, or if you queeze something your not supposed to in. here it goes:

day 1: 2 fruits for breakfast(they have to be the same fruit, like 2 apples, 2 oranges, if your eating berries then 2 cupfulls), lunch-300 gr of meat(baked, grilled or cooked), salad, 1 slice of bread, and soup(you can change the meat for 2 boiled eggs, like if you dont wanna make a meal or dont have time), dinner 150 gr of meat baked, cooked, or grilled, salad, no bread, no soup(u can substitute 150 gr meat for 1 hard boiled egg)

day 2: 2 fruits for breakfast(have to be the same like 2 apples, 2 oranges etc), lunch-one large plate full of rice OR peas OR beans OR lentils OR 2 baked or cooked potatoes, salad and 1 slice of bread, dinner-half of what you had for lunch, salad you can have as much as u want