It can be. Ideally, you should only lose 1 to 2 pounds per week, if you are dieting to lose weight. Anything significantly greater can be dangerous. If you intentionally lose weight very quickly by taking in very small numbers of calories, it is often associated with an imbalance in the nutrients you are taking in, as well as the "cannibalization" of some of your body's muscle when it goes into a starvation mode. Because your heart is a muscle, it can actually do damage to this and other organ systems, depending on how long your "diet" lasts. If it is not intentional, and you lose weight very quickly for no obvious reason, it could be a sign that there is something wrong in your body that needs immediate medical attention. Please see a doctor as soon as possible.
The best way to lose weight is to cut out the high calorie foods and snacks and replace them with fresh vegetables and lean meats and increase your activity. It can be slow and frustrating, but it will keep you healthier. Losing weight is only one of the ways you can make your quality of life better - another is paying attention to your nutrition and exercise. It's not as important what you weigh as how fit you are.
If you gain weight quickly you will have fat problems. And if you lose weight too quickly you will suffer anorexia before you have a chance to gain the average weight. And that is the truth.
because its unhealthy
You can lose weight by exercising (not too vigorously) and having a well balanced diet
Ideally, you don't want to lose weight too quickly. You have a better chance of losing and keeping weight off by following a sensible diet along with a cardio exercise method.
Here are a few sites that can help you lose weight quickly from the following sites www.webmd.com/diet/guide/lose-weight-fast-how-to-do-it-safely , and the following www.slimfast.co.uk/
If you are extremely overweight you can do gastric bypass. Otherwise, losing weight too fast isn't safe and you will gain it back.
There is no healthy way to lose weight quickly. The fastest way you can lose weight is eat well, sleep at least 8 hours each night with no interruptions and excercise regularly.
There's only one way that is not gonna make you die really quickly too. Eat healthy and burn calories by working out or playing sports.
Diet/exercise.
If done quickly, both losing weight or gaining weight will put the body into crisis-mode and cause some degree of damage at least in the short term. Doctors and dieticians recommend losing or gaining weight gradually, allowing a whole month for every 4 to 8 pounds you want to lose or add. A cycle of diminished physical fitness will happen if you diet too quickly (too drastically). As soon as you ease up on a drastic diet, your weight will likely soon revert to its former level.See also:Eating healthily
The weight that you initially lose is water, not fat and losing too much water can have negative side effects such as dehydration. Furthermore, if you restrict your diet too much you will be missing out on important vitamins and minerals. Losing weight too quickly can also leave you feeling tired and effect the appearance of you hair and skin. x
you might gain more weight than before if you diet too fast/you will increase the amount of fat and your heart has to pump harder.