According to the weight of 55kg and light activities (walking 4 ~ 5 kilometers, shopping, laundry, golf, etc.) every day, the basic calories needed for one day are about 2000kj.
If you want to lose weight, you can't 1500kj every day.
So, unless you drink two bottles of this drink every day and don't eat three meals, you may lose weight. . . . . .