2012年-世界发展银行全球_The_Double_Burden_of_Malnutrition___A_Review_of_Global_Evidence_74页_2mb

Summary of "The Double Burden of Malnutrition: A Review of Global Evidence"

Core Content

"The Double Burden of Malnutrition (DBM)" is a comprehensive review that examines the coexistence of undernutrition and overnutrition across the life course. It highlights how early life undernutrition contributes to an increased risk of overnutrition and related diseases in adulthood. The paper explores the causes, consequences, and potential solutions to DBM, emphasizing the need for integrated policy and program frameworks.

Main Points

Definition of DBM

• DBM refers to the coexistence of undernutrition and overnutrition in the same population across the life course.
• Early undernutrition increases the propensity for overnutrition and non-communicable diseases (NCDs) in adulthood.

Global Impact

• DBM affects all countries, both rich and poor.
• Women are most affected at the population level, with more overweight than underweight women.
• At the household level, DBM is common in Latin American countries, where stunted children coexist with overweight/obese women.
• In the US, the most common form of DBM is energy overnutrition and iron deficiency.

Consequences of DBM

• Early life undernutrition is a leading cause of young child deaths, contributing to about a third.
• Stunted children face lifelong impairments in disease resistance, physical work capacity, and educational outcomes.
• Obesity is a major underlying cause of NCDs such as hypertension, diabetes, cancer, stroke, and ischemic heart disease.
• NCDs account for the majority of global deaths, with 80% occurring in low and middle-income countries (LMICs).
• Cardiovascular disease (CVD) accounts for nearly half of NCD deaths in 2008.
• The metabolic syndrome, linked to abdominal obesity and type 2 diabetes, doubles the risk of CVD and increases healthcare costs.

Causes of DBM

• DBM is associated with global transitions:
  • Nutrition Transition: Shift from traditional to processed, energy-dense diets.
  • Demographic Transition: Changes in fertility rates and aging populations.
  • Epidemiological Transition: Shift from infectious diseases to NCDs as the main causes of death.
• Four cross-cutting themes influence DBM:
  1. Health/Biological Environment: Metabolic programming due to early growth constraints increases the risk of CVD and diabetes.
  2. Economic/Food Environment: Increased wealth and food production have led to a shift toward "westernized" diets, with processed foods being more "obesogenic."
  3. Physical/Built Environment: Urbanization reduces physical activity and increases reliance on ultra-processed foods.
  4. Socio/Cultural Environment: Cultural norms, media, and advertising influence food choices and physical activity patterns.

Solutions and Policy Recommendations

• Solutions for undernutrition and overnutrition are reasonably well recognized.
• However, they have not been integrated into a cohesive policy and program framework.
• The World Health Assembly (WHA) and Codex Alimentarius Commission provide policy guidance.
• The paper proposes a multisectoral framework for addressing DBM, including:
  • Direct interventions through health services, education, and workplaces.
  • Indirect interventions via fiscal policies and financial incentives.
• The Scale Up Nutrition (SUN) movement aims to improve nutrition programs in LMICs, particularly for maternal and child undernutrition.
• A coordinated, multi-stakeholder approach with country ownership is essential for effective DBM intervention.

Challenges and Capacity

• Most countries lack the capacity to implement a wide range of interventions to address DBM.
• LMICs have limited resources for nutrition programs, often restricted to undernutrition.
• Existing governance mechanisms are fragmented and lack authority for addressing the full scope of DBM, including food security and safety.
• A comprehensive policy framework is needed to manage the complexity of DBM across the life course.

Key Information

• DBM is a global issue affecting all countries, with particular concern in regions with high stunting rates.
• Undernutrition and overnutrition are interconnected, with early life undernutrition increasing the risk of adult overnutrition and NCDs.
• The four themes (health/biological, economic/food, physical/built, socio/cultural) provide a conceptual framework for understanding DBM.
• Global transitions such as nutrition, demographic, and epidemiological transitions have accelerated DBM.
• Solutions require multisectoral coordination, including health, education, economic, and social policies.
• SUN movement is a key initiative to improve nutrition in LMICs, but it needs to be expanded to address DBM comprehensively.
• Governance and funding are critical for implementing DBM interventions, but current systems are inadequate.

Conclusion

The DBM represents a significant challenge for global health and development. It underscores the need for integrated, evidence-based policies and programs that address both undernutrition and overnutrition across the life course. Without such a framework, the long-term health and economic consequences of DBM will continue to burden LMICs and global health systems.