Food Fortification

What Is Food Fortification?

Food fortification is the deliberate addition of one or more essential nutrients to a food, regardless of whether those nutrients were originally present in the food. It is a public health strategy used to prevent or correct documented nutrient deficiencies within a population. Fortification differs from enrichment, which refers specifically to restoring nutrients lost during food processing, and from supplementation, which involves delivering nutrients in pill or capsule form outside of the food supply.

Common Examples of Fortification

Fortification programs have been implemented globally with measurable success in reducing nutrient deficiency diseases:

• Iodized salt: The addition of iodine to table salt has dramatically reduced iodine deficiency disorders, including goiter and cretinism, across much of the world since the 1920s.
• Vitamin D in milk: Rickets, a bone-softening disease caused by vitamin D deficiency, was widespread before fortification of cow's milk with vitamin D became standard practice in North America.
• Folic acid in grain products: Mandatory fortification of flour and cereal grains with folic acid has led to a significant reduction in neural tube defects such as spina bifida.
• Iron in cereals: Ready-to-eat breakfast cereals are often fortified with iron and B vitamins to improve intake among populations at risk of deficiency.

Benefits and Considerations

Fortification reaches large segments of the population through staple foods without requiring changes in individual behavior, making it a cost-effective public health intervention. However, it also raises considerations around over-fortification in populations with already adequate intake, particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. Bioavailability of added nutrients can also differ from naturally occurring forms. Regulatory bodies in most countries set upper limits on fortification levels to balance efficacy against risk. When designed and monitored carefully, fortification remains one of the most impactful nutrition interventions available.