**4. Conclusions**

There is great interest in the consumption of animal meat from free-range systems. Pork is very popular and generally provides an important source of nutrients, mainly protein. When pigs receive acorns, the fruit of the oak *Q. robur*, in their diet, they showed an increase in the level of essential fatty acids. Examples of this are the Iberian pig in the Spanish Iberian province and the wild boar in southern Chile. Both show an increase in the level of fatty acids *n3* and *n6* and a decrease in cholesterol when acorns are part of their diet.

The Iberian pig is endemic in Spain, the wild boar is an introduced species that harm the ecosystem. Therefore, its use as a productive species could contribute as a measure of control of the species and also contribute to the sustainability of the environment.
