During the pineapple diet you only eat or drink pineapple or pineapple juice. Two kilos of pineapple have approx.. 1.000 kcal. It is a very one-sided nutrition, leads however to rapid decrease in weight at the beginning particularly by much loss of water. There is the danger protein -, vitamin -, ballast material and lack of mineral material. One cannot learn here as one in the course of the day healthy to nourish itself should.