It is not surprising that many people wonder why fad diets are bad when they seem to get results. You will find many sites on the internet claiming significant weight loss in just a few days. That type of weight loss is always temporary. It is usually 90% water which will be put straight back on as soon as your body rehydrates, which it must do if you are not going to suffer severe health problems or die.
Conjugated linoleic acid is a natural substance found in many of our foods that according to many studies can reduce fat and improve muscle mass in the body. Taken as a supplement with no change in eating or exercise habits, it would not make you lose weight but it could help you lose fat. It is often taken by men looking to lose weight and bodybuild at the same time, but it can also be useful for anyone who is overweight and under-exercising, as any increase in muscle will increase the metabolism, burning more calories.