Nutrition Direct

Optimal nutrition and the ever-changing dietary landscape - PMC

To function optimally, the human body requires two main categories of nutrients: nutrition

Nutrition is the science of how food fuels the body, influences long-term health, and prevents chronic disease. While once focused primarily on preventing deficiencies (like scurvy or rickets), modern nutrition research now tackles the "diseases of excess"—obesity, Type 2 diabetes, and cardiovascular issues—driven by high-calorie, ultra-processed environments. The Building Blocks: Macronutrients and Micronutrients Optimal nutrition and the ever-changing dietary landscape -