Adding Vitamins to Flour Costs Less Than $150 per Healthy Life-Year Saved

For every dollar spent adding iron, iodine, vitamin A, or folic acid to staple foods like flour and salt, the return in prevented illness and death is enormous. That is the consistent finding across more than 200 economic analyses spanning 63 countries, assembled in what researchers call the most comprehensive economic review of food fortification ever conducted.

The scale of hidden hunger

Hidden hunger -- the chronic lack of essential vitamins and minerals in a person's diet -- affects hundreds of millions of people worldwide. It does not necessarily mean someone is visibly malnourished or starving. It means their body is not getting the micronutrients it needs to function properly. The consequences are severe: increased mortality, impaired cognitive development in children, and higher rates of disease.

An estimated 56% of children aged 6 to 59 months and 69% of non-pregnant women aged 15 to 49 suffer from hidden hunger globally. Children and pregnant women face the greatest risks, and the problem worsens during periods of food insecurity and rising food prices.

What the numbers show

The systematic review, published in The Journal of Nutrition by researchers from the Cochrane Collaboration, Food Fortification Initiative, Emory University, and TechnoServe, examined 56 studies containing 232 cost-effectiveness analyses. The results were remarkably consistent across different countries, food vehicles, and nutrients.

Of those 232 analyses, 58% reported incremental cost-effectiveness ratios (ICERs) below $150 per disability-adjusted life year (DALY) averted. A DALY combines years of life lost to premature death with years lived with disability -- it is the standard metric for measuring disease burden. Eighty-four percent of the analyses came in under $1,000 per DALY averted compared to no fortification.

All 47 benefit-cost ratios calculated across the included studies were positive, meaning the monetary value of health benefits exceeded the costs in every case.

When measured against country-level economic thresholds based on GDP per capita, 87% of fortification interventions fell within 50% of a country's GDP per capita. In low-income countries specifically, 71% of interventions cost less than 20% of GDP per capita -- well within the range that health economists consider highly cost-effective.

What gets fortified, and with what

The most commonly analyzed combinations involved adding vitamin A, vitamin B9 (folic acid), iron, and iodine to cereal grain products -- especially wheat flour -- and to condiments such as edible oils, sugar, and salt. These are foods that populations already consume in large quantities, making them efficient delivery vehicles for nutrients that would otherwise require supplements or dietary changes that may be impractical in resource-constrained settings.

Timing matters: aid cuts and rising need

The review arrives at a particularly difficult moment for global nutrition. Dramatic cuts to international aid in 2025 have reduced available funding for health programs by an amount equivalent to 44% of the $1.6 billion provided for malnutrition in 2022. The researchers estimate these reductions will put approximately 2.3 million severely malnourished children at additional risk, potentially causing an estimated 369,000 preventable child deaths annually.

In this context, the case for cost-effective interventions becomes more urgent, not less. Food fortification does not require building new health infrastructure or changing individual behavior. It works through existing food production systems.

Limitations and what they mean

The review's authors are transparent about the quality of the underlying evidence. Reporting standards varied across the 56 included studies, and some analyses lacked the granularity that health economists would prefer. But the sheer consistency of positive results across diverse countries, economies, and methodologies gives the overall conclusion substantial weight.

The review also cannot answer every question policymakers might have. It does not assess whether specific fortification programs are reaching the populations most in need, or whether implementation quality varies in ways that affect real-world outcomes. Those are important questions, but they are questions of program execution rather than fundamental cost-effectiveness.

The Copenhagen Consensus ranked food fortification among the top cost-effective nutrition interventions in 2008. Nearly two decades of additional research, compiled in this review, has only strengthened that case.