Juices that are preserved by pasteurisation are exposed to high temperatures and therefore heat in order to kill germs and microorganisms. However, this process also destroys heat-sensitive vitamins, enzymes and nutrients that were originally present in the ingredients used. If you incorporate such pasteurised juices into your diet, you miss out on these important nutrients and vitamins, for example. The heat used also causes the ingredients in the juicer to oxidise, which affects the flavour of the juices. Compared to cold-pressed juices, they taste less fresh and do not taste like they have come straight from the juicer.