Micronutrients, or vitamins and minerals needed in small quantities, are essential for good nutrition, proper growth and development, and overall health. Their deficiency contributes to extensive health problems and death throughout low-income countries, afecting millions of people globally each year. The negative impacts of these deficiencies, however, are not easily perceived because clinical signs appear only under extreme situations. The term “hidden hunger” is ofen used to characterize the dificulty in timely detection of the consequences of micronutrient deficiencies.