Everybody has a different reason for being overweight. It could be hereditary or genetic or caused by some condition with an organ in your body; it may be due to the types of food and the amount of food that the individual consumes; or it may be due to the lack of exercise and the overall lifestyle of the person.
The reason why you are overweight, while important to try to solve your weight loss dilemma, isn't as important as the fact that you are overweight and you need to lose weight, and you want to lose weight quickly.
There are several types of people that are on the lookup for quick weight loss solutions and are sometimes desperate to find ways to lose weight quickly. There are people who are extremely obese and/or have become aware or are concerned about health problems that the excess weight can cause. Or there are the people that put a lot of importance on their physical image and want to make sure that they look the best they can.
The consensus in the health industry is that the typical person can lose about 1 to 2 pounds of weight per week just by eating correctly and doing a reasonable amount of exercise (walking, etc). This is the long term method that will take quite a bit of time but in the long run will pay off the most for people.
By combining these safe approaches with an appropriate weight loss supplement or dedicated exercise system you can raise that to maybe 2 to 3 pounds per week.
While many people would like to lose weight quicker, you have to remember that your body can only handle so much fluctuation in body weight and while you may be able to lose 10-15 pounds a week, you can't do that long term.