It is the process of adding certain nutrients to commonly used food material to improve the quality of food and to prevent deficiency disorders. 

Examples food fortification:

• Iodised salt – adding iodine to common salt to prevent endemic goitre
• adding flouride to water to prevent dental caries
• adding vitamin A and vitamin D to milk and vanaspathi

For a particular food material (vehicle) to be fortified by adding a particular nutrient, the following criteria is to be met:

• The food item should be one that is commonly used by the target population
• The amount of nutirent added should be in such a way that it would provide adequate amounts for people eating the food occassionally and should not rise to toxic amounts in persons who take the food item regularly
• The cost of the fortified should not be so high as to be beyond the reach of those who need it most
• The addition of nutrient should not cause any change in the taste, colour, odour or consistency of the food item

1. Assessment of nutritional status
2. CARE – Projects in India
3. Vision 2020 – The right to sight
4. Blood supply of bone