Nutrient density: addressing the challenge of obesity

Area of Science:

• Nutrition Science
• Public Health
• Health Economics

Background:

• Global obesity rates are rising, linked to increased consumption of energy-dense, low-cost foods over nutrient-rich options.
• Consumer food choices are heavily influenced by price, contributing to social inequities in diet quality and health outcomes.
• The global food supply presents challenges in achieving nutrient-rich diets affordably.

Purpose of the Study:

• To explore the role of nutrition economics in diet quality and health inequities.
• To introduce new metrics for assessing nutrient density and affordability of foods.
• To investigate strategies for promoting healthier, more affordable dietary patterns.

Main Methods:

• Development of affordability metrics by integrating food prices with food composition data.
• Calculation of kilojoules (kJ) and nutrients per unit cost (e.g., per penny).
• Merging dietary intake data with food prices to estimate individual diet costs and analyze food patterns.

Main Results:

• New nutrient density and affordability metrics enable identification of nutrient-rich, cost-effective food options.
• Calculations of nutrients per penny provide insights into the economic drivers of food choice.
• Behavioral factors like home cooking are associated with nutrition resilience (healthier diets at lower cost).

Conclusions:

• Nutrition economics plays a significant role in diet quality and health disparities.
• Novel metrics can empower consumers to make healthier, more affordable food choices.
• Integrating economic feasibility studies with dietary advice is crucial for public health.