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Demonstrating Nutrient Cost Gradients: A Brooklyn Case Study.

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Micronutrient-rich foods are often more expensive, increasing deficiency risk for low-income families. Cost-per-serving analysis helps, but doesn

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Area of Science:

  • Nutrition Science
  • Public Health
  • Food Economics

Background:

  • Micronutrient-dense foods typically incur higher costs than energy-dense options.
  • This cost disparity poses a significant risk for diminished micronutrient intake among low-income populations.

Purpose of the Study:

  • To investigate the cost differences of iron, folate, and choline in foods available to low-income communities.
  • To analyze these costs based on both energy content and serving size.

Main Methods:

  • Evaluated 69 foods from USDA menu plans for low-income families across 10 domains.
  • Determined the cost per energy unit and per serving for iron, folate, and choline.
  • Correlated food costs with micronutrient content using statistical tests (Kruskal-Wallis, Spearman rho).
  • Interviewed 90 families to understand the impact of food costs on dietary choices.

Main Results:

  • Significant variations in cost-per-energy and cost-per-serving were observed across food domains.
  • Micronutrient content (iron, folate, choline) strongly correlated with cost-per-energy.
  • Iron and choline content also correlated significantly with cost-per-serving.
  • Over 40% of families reported worrying about food costs and selecting higher-calorie foods in response.

Conclusions:

  • Cost-for-energy analysis reveals significant price differentials for energy and micronutrients in USDA meal plans.
  • Cost-per-serving analysis reduces but does not eliminate these differentials.
  • A considerable number of low-income families remain susceptible to micronutrient deficiencies due to economic constraints.