If you have a goal to lose six pounds in one week, then you are basically going to have to become a vegan for seven days. Being a vegan means that you can't eat meat or any animal products, which includes dairy products. You must cut out sugar and starches in your diet. Exercising is optional, however, it is recommended that you exercise for at least 20 minutes daily to lose the extra pounds in seven days. Eat plenty of fruits and vegetables throughout your day and your goal should be attainable.