Can you lose weight just by eating cheese sandwiches for a week?

* You may or may not lose weight. However, I don't recommend it. Even if you did lose weight you WILL put it back on again when you return to normal eating. You are also starving your body of key nutrients and vitamins which you need to be healthy, and survive. * If I ate cheese Sandwiches for one week I would gain weight. Most people would. Eating cheese sandwiches is not the way to lose weight. You would be eating fat too many refined (processed) carbohydrates. Refined (processed) carbohydrates are a major cause of weight gain and obesity.