The diet of Galicia is the result of a perfect combination between the quality and diversity of the products of their lands and seas and a simple and healthy elaboration. To the benefits of the Galician products already known by the Celts, the Romans or the Early Medieval pilgrims have been added the inheritances received from the American shore of this ocean that we share, constituting the bases of the Atlantic diet. Galician food is characterized by an abundance of seasonal foods from plants (fruits, vegetables, potatoes, bread and cereals, nuts, chestnuts, honey and legumes), high consumption of fish and shellfish, moderate milk, veal meat fed exclusively with breast milk and pastures, olive oil, use of sauces with low energy load and high-quality fat and homemade desserts composed mainly of flour, eggs and nuts. The Galician Atlantic diet is healthy, functional and bioactive, and without doubt along with a favorable genetic profile, and adequate lifestyles, physical activity and inactivity, favored by our urbanism, with a distribution of the population in small rural areas, has collaborated so that we have one of the longest living populations with a high quality of life. Currently, the data reflect alarming figures of overweight and obesity, especially in the infant-juvenile age, most likely in relation to, among others, the loss of adherence to our traditional diet. To continue as before, Galician children and adolescents could live less than their grandparents, but also with more associated comorbidities. It is necessary to establish strategies to promote recovery and adherence of our Atlantic diet in north-western Spain.