Guillermo Casas Ares is an expert in Sports Nutrition with extensive professional experience. Throughout his career he has been linked to several teams, clubs and athletic federations at local and national level. From these job responsibilities, he has had the obligation to design personalized dietary plans according to the needs of the players and the incorporation of specific supplements.  

In turn, he has collaborated with the private practice BocadoaVocado Nutrition and with the company VRAC Quesos Entrepinares. He has also maintained an active training and completed an International Master's Degree in Clinical Nutrition and Sports Nutrition and another in Nutrition in Physical Activity and Sport.

• Dietitian-Nutritionist in Spanish Rugby Federation
• Dietitian-Nutritionist in Castilla y León Football Federation 
• Dietitian-Nutritionist in VRAC Quesos Entrepinares
• Dietitian-Nutritionist in Private Clinic BoadoaVocado
• Dietitian-Nutritionist in Private Practice DCIENCIASALUD
• Sports Dietitian-Nutritionist in University of Valladolid Football 11 
• Master's Degree in Nutrition in Physical Activity and Sport by the Universidad Oberta de Cataluyna 
• International Master's Degree in Clinical Nutrition and Sports Nutrition from the University Isabel I and the International Institute of Physical Exercise Science and Health
• Degree in Human Nutrition and Dietetics from the University of Valladolid