A one-kilogram mass is still a one-kilogram mass (as mass is an extrinsic property of the object) but the downward force due to gravity, and therefore its weight, is only one-sixth of what the object would have on Earth. So a man of mass 180 pounds weighs only about 30 pounds-force when visiting the Moon.
Like all fruit, apples contain fructose, and too much of this sugar at a time provides your intestinal bacteria with a substrate in which to ferment, which leads to gas production, bloating and abdominal pain. Apples are a healthy addition to any diet, but too many can lead to digestive issues.
Apples have minimum calories, maximum vitamins and bioactive nutrients. In 3 days you will lose 5 pounds. You also can try to follow the diet every other day but the result will not be so impressive. An apple diet is very safe and short. Pectin, fruit acids and potassium burn calories, improve your metabolism and digestion. Everybody can do it.