Fitday states that sprinkling lemon juice on foods does not reduce the fat and calorie content of foods and the amount that the body uses from food ingested. Fitday also states that drinking lemon juice mixed with water does not dissolve the fat in a person's body.
According to Fitday, the belief that lemon juice has the same effect as stomach acids on fats is a myth. Lemon juice does help break down collagen on meat, which gives it similar properties to those of a tenderizer. Lemon juice may help one feel full faster with its ability to reduce the glycemic index of food. It also serves as a good source of vitamin C.