Lancet Study: Food Fortification Impact Prevents Nearly 7 Billion Nutrient Gaps Globally

26 March 2026, Geneva: A new global analysis has highlighted the significant role of large-scale food fortification in addressing micronutrient deficiencies, estimating that current programs prevent nearly 7 billion nutrient gaps annually worldwide. The findings underscore both the effectiveness of fortification and the substantial untapped potential to expand its impact at relatively low cost. 

The study, published in The Lancet Global Health, provides the first comprehensive global assessment of the costs and benefits of fortifying staple foods such as wheat flour, rice, oil, and salt with essential vitamins and minerals. It shows that these interventions are currently delivered at an average cost of just $0.18 per person annually, making them one of the most cost-effective public health strategies available. 

Micronutrient deficiencies remain a widespread global challenge, affecting large populations, particularly women of reproductive age and young children. These deficiencies are associated with increased disease risk, poor health outcomes, and reduced cognitive development. According to the analysis, despite existing fortification efforts, an estimated 38.6 billion nutrient gaps still persist globally due to factors such as poor diet quality, inadequate program coverage, and weak compliance with fortification standards. 

The research identifies iodized salt as one of the most successful fortification interventions, accounting for nearly half of the total benefits. It is estimated to prevent 3.3 billion iodine deficiencies annually, significantly reducing global iodine deficiency rates. 

Beyond current achievements, the study outlines a clear pathway to significantly expand impact. By improving compliance with existing fortification standards, aligning national regulations with global guidelines, and extending programs to underserved regions, the total number of prevented nutrient gaps could rise to 25 billion annually. These improvements would still remain relatively low-cost, with even the most comprehensive scenario estimated at about $1.15 per person per year. 

The economic case for fortification is also strong. The study estimates that every dollar invested in fortification yields approximately $27 in returns through improved health outcomes and productivity gains. This is particularly relevant as global food affordability challenges persist, with billions of people unable to access nutritionally adequate diets. 

However, the findings also emphasize that fortification alone cannot fully eliminate micronutrient deficiencies. Even under optimized scenarios, a substantial number of nutrient gaps would remain, indicating the need for complementary strategies such as dietary diversification, targeted supplementation, and improved access to nutritious foods. 

The study concludes that governments, industry stakeholders, and development partners have an immediate opportunity to strengthen fortification programs by enforcing existing regulations, improving monitoring systems, and expanding coverage in high-need regions. With relatively modest investments, food fortification can play a central role in improving global nutrition and reducing the long-term economic and health burdens associated with malnutrition. 

The study integrated dietary intake data from the Global Dietary Database with fortification program data from the Global Fortification Data Exchange, assessing deficiencies across 13 micronutrients. It also evaluated implementation costs—including premix, industry equipment, quality assurance, and government monitoring—across five key fortified staples: wheat flour, maize flour, rice, oil, and salt. The research was supported by the Swiss Agency for Development and Cooperation and the Gates Foundation, with all data and analysis code made publicly available.

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