Modern lifestyle and nourishment.
Many of Portuguese's lifestyle is punctuated by a poor way of feeding themselves, meals badly respected, processed food, behaviours that may compromise health state.
In another way, the food preparation itself may be so that nutrients and vitamins are lost, as they are affected by heat, by inappropriate storage of food, by the presence of oxygen, light or humidity.
The ideal way of cooking food is by steaming it or using little quantity of water. One of the advantages of soup, for instance, is to be able to use the water where vegetables were cooked for it is a stock rich in vitamins freed while boiling.