Breastfeeding is a priority line of research of our group, which we have been working on since 1997, and we are continuing to work on it. The objective that is achieved is the establishment of breastfeeding in neonatal hospital units, moreover, the prevention of cracked nipples of breastfeeding mothers is being worked on, by applying extra virgin olive oil on each nipple after feeding. We are working on the diet of the child and adolescent, overweight and obesity.