For the last 30 years, the population of Mexico has grappled with overweight, obesity, and associated chronic diseases, such as type-2 diabetes and hypertension. To standardize care among healthcare providers and dietitians, an official nutritional guideline was published in the early 2000s, which included a non-modifiable food-based dietary guideline in the shape of a plate called El Plato del Bien Comer (“The Plate of Well Eating”). In the present work I examine El Plato’s current use among young Mexican dietitians in their private consultation with office workers to consider the impact that it is having on dietary patterns in Mexico City. I draw on participant observation in regular private nutrition consultations, in depth interviews with five office-worker patients, and a focus group of four Mexican dietitians using photo-elicitation, as well as in depth interviews with two nutrition experts who helped to develop guidelines. I illustrate the diversity in consultation styles and health education tools among the dietitians who have been mandated to use El Plato. I also describe the divergence in patient’s “correct” eating practices, which varied greatly between the weekdays and weekends. The thesis highlights the debate El Plato stirred among participant dietitians and concludes with a suggestion with how Mexican officials might redesign El Plato’s dietary guidelines today.