Science on the Plate: Why Nutrition Education Is the True Guide

The case of the US food pyramid: when graphics confuse more than they clarify

The United States, under President Trump, has updated the Dietary Guidelines for Americans 2025–2030 , with the aim of promoting a more "real" and less processed diet. But more than specific recommendations on proteins, grains, or sugars, what really emerges is an often overlooked message: knowing how to eat is just as important as knowing why .

The cornerstones of the new US nutritional guidelines

• Proteins

  The guidelines recommend protein, from both animal and plant sources, with a suggested intake of 1.2–1.6 g per kg of body weight per day. The inclusion of red meat among the main sources represents a departure from the Mediterranean diet, which limits its consumption to approximately one serving per week.

  
  

• Carbohydrates and fiber

  Whole grains are favored over refined flours, with the goal of increasing fiber intake. However, outright demonization of white flour products may be excessive, as indicated by Italian guidelines that recommend a balance between whole grains and refined flours.

  
  

• Sugars, ultra-processed foods and alcohol

  The emphasis is on reducing ultra-processed foods and added sugars, as well as limiting alcohol intake in general, but the risks of even moderate amounts are not highlighted.

  
  

Nutrition education at the centre

Pyramids, tables, and numbers are useful tools, but alone they're not enough. Without effective nutrition education, scientific messages risk being misunderstood or ignored. The food pyramid proposed in the US, for example, appears counterintuitive and can lead to confusion about the relative roles of different food groups.

Clear and accessible communication therefore becomes the true ingredient needed to transform knowledge into behavior: understanding the role of food groups, the reasons for certain portion sizes, or the effect of sugars and fats on health is not a minor detail, but the basis for making informed choices.

In a world where food information circulates rapidly—and often contradictorily—knowing how to read, interpret, and apply scientific evidence is a true act of empowerment. Nutrition education isn't just about what we eat, but how we think about food : developing awareness, distinguishing between fads and scientific data, and building healthy habits that last.

In this sense, the guidelines become a tool, but the real protagonist is the ability to translate science into daily choices , making each of us responsible and aware of our own diet.

Bibliography:

1. US Department of Health and Human Services; US Department of Agriculture. Dietary Guidelines for Americans, 2025–2030 . Published 2026.

2. US Department of Agriculture and US Department of Health and Human Services. Dietary Guidelines for Americans, 2020-2025. 9th Edition. December 2020