You can probably lose weight with any of the weight loss diets popular today. At least at first.
However keeping that weight off permanently is a different matter. Much initial weight loss is due to a loss of water and muscle tissue, instead of body fat. And given that muscle weighs more than fat, you will appear to have lost weight quickly.
And losing weight without harming your body by modifying your metabolism, forcing it to break down muscle and fat incorrectly, and depriving your body of nutrients, is much harder.
Most quick diets work by cutting carbohydrates such as bread, potatoes and pasta. But without these foods providing energy, your body will break down muscles to get at the carbohydrates stored there (called glycogen).
If you have not eaten enough food to provide energy until your next meal, your blood sugar level (glucose) will drop and you will feel hungry. If you still don’t eat, your body will grab some glycogen, convert it to glucose and you will temporarily feel less hungry. But at the cost of loss of vital muscle.
Muscle tissue is what keeps your body looking firm, so loss of muscle tissue is the reason dieters often look gaunt and drawn.
More importantly, you need to get your head around the idea that the best weight loss will happen slowly, rather than quickly.
A long-term lifestyle change, with healthy eating and exercise is the only solution a caring nutritionist should recommend.
See the menu for reviews of specific diets.