2024-09-01-世界银行-食品强化_全球农业综合企业（英）_49页_3mb

Summary of Food Fortification

Core Content

Food fortification refers to the addition of one or more nutrients to a food product during or after processing. It is a key strategy to address micronutrient deficiencies that affect nearly two billion people globally, including in industrialized countries. Fortification helps restore lost nutrients, add nutrients not naturally present, or standardize nutrient levels in variable food products. It is particularly effective in improving public health outcomes, especially when implemented on a large scale.

Main Views

• Historical Development: The concept of food fortification dates back to 400 B.C., but it became a widespread public health intervention in the early 20th century with the introduction of iodized salt in Switzerland (1923) and the U.S. (1924). The 1930s and 1940s saw significant progress due to advances in nutrition science and mass production of vitamins and minerals.
• Global Impact: Micronutrient deficiencies continue to be a major public health concern. Fortification has been successful in reducing deficiencies like iron deficiency anemia and neural tube birth defects (NTDs) in several countries.
• Public-Private Partnership: Food fortification requires collaboration between government, private sector, NGOs, and academia. Governments set standards and regulations, while the private sector drives innovation and production. Donor funds can play a catalytic role in supporting the initial phase of fortification programs.
• Mandatory vs. Voluntary Fortification: Mandatory fortification is more effective in ensuring population-wide nutrient intake, especially in developing countries. Voluntary fortification is often used in developed economies as a commercial strategy.

Key Information

• Types of Fortification:

  • Enrichment: Restoring nutrients lost during processing.
  • Fortification: Adding nutrients not naturally present.
  • Standardization: Ensuring consistent nutrient levels in variable foods.

• Common Fortified Foods:

  • Staple foods such as wheat flour, maize flour, rice, and vegetable oil.
  • Condiments like salt, sugar, and bouillon cubes.
  • Milk, margarine, and other widely consumed products.

• Fortification Standards:

  • The Copenhagen Consensus estimates a cost-benefit ratio of 1:30 for food fortification.
  • Fortification levels are often set based on per capita consumption and bioavailability.

• Economic Considerations:

  • Costs include capital investment, fortificant premix, import tariffs, QA/QC implementation, and training.
  • Industry needs to ensure market returns are at least comparable to a business-as-usual scenario; otherwise, other stakeholders may need to support the initiative.

• Safety and Risks:

  • Overdose Risk: No documented toxicity from fortified foods when produced according to official standards.
  • Under-Fortification: Can occur due to poor QA/QC procedures or intentional mislabeling.
  • Contamination: Risks exist at all stages from production to consumption. Aflatoxin is a particular concern in moist and hot storage conditions.

• Consumer Acceptance:

  • Fortified foods are "credence goods," meaning consumers rely on producers and regulatory bodies to ensure quality.
  • Sensory/organoleptic issues (e.g., changes in color, taste, texture) must be addressed to maintain consumer trust.
  • Social marketing and formative research are essential to ensure acceptance and prevent misinformation.

Technical Fortification Issues

• Vehicle Selection: Vegetable oils are ideal for vitamin A and D fortification due to their high lipid content, broad distribution, and existing processing systems.
• Stability and Bioavailability:
  • Vitamin A: Retinyl palmitate is the most commonly used form due to its stability. It is well-retained in storage and cooking, though repeated frying can lead to significant losses.
  • Vitamin D: Less studied in vegetable oils, with concerns about thermal and oxidative degradation. It is less suitable for frying compared to vitamin A.
• Recommended Levels:
  • World Food Program (WFP) recommends 30,000 IU vitamin A/kg and 3,000 IU vitamin D/kg for vegetable oil fortification.
  • An overage is often added to account for losses during handling, storage, and cooking.

Special Considerations

• Oil Quality: High peroxide values (PV) and acid values in vegetable oils negatively impact vitamin stability and shelf life.
• Refining Processes: Poor refining, especially deodorization, can increase PV and reduce oil quality.
• Health Implications: Rancid oils can produce harmful byproducts, increasing cancer risk and reducing the effectiveness of fortification.
• Obesity Concerns: Promotion of fortified oils should focus on shifting consumption from non-fortified to fortified versions, not increasing overall consumption.

Conclusion

Food fortification is a powerful public health tool that requires a coordinated effort across multiple sectors. It is most effective when implemented on a large scale and supported by strong regulatory frameworks, QA/QC systems, and consumer education. While it presents technical and economic challenges, the benefits to public health are substantial, making it a critical strategy in combating micronutrient deficiencies globally.