Our expert says:
As you say, this is only for a short period that you will be using this diet. I presume that you are feeling tired because the diet is so low in carbohydrates. The shake probably also contains most of the vitamins and minerals you require (e.g. calcium, iron, zinc, etc), so for a short time you can probably use this diet to try and achieve your weight loss of 6 kg, but please don't continue after the 2,5 weeks as you do need carbs and the very high protein intake can damage your kidneys.
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