Micronutrient deficiencies pose significant public health challenges, particularly in developing countries where staple grains constitute the primary dietary component. Conventional fortification methods often suffer from issues such as low bioavailability and instability of micronutrients during processing and storage. Nanoemulsion technology has emerged as a promising solution for enhancing the nutritional profile of staple grains by improving the delivery and efficacy of micronutrient fortification. This chapter explores the fundamental principles and applications of nanoemulsion technology for fortifying staple grains with essential micronutrients and highlights the advantages of nanoemulsions in enhancing the bioavailability and stability of these nutrients, providing a detailed overview of the formulation strategies and preparation techniques necessary for creating stable and efficient nanoemulsions. Key mechanisms through which nanoemulsions improve the bioavailability and stability of micronutrients are explored including encapsulation of micronutrients within nano-sized droplets, protection from environmental degradation, and enhanced absorption in the gastrointestinal tract. Also, insights on the various methods employed to produce nanoemulsions, such as high-energy techniques and low-energy techniques, are provided. Case studies in the application of nanoemulsion technology to fortify staple grains such as rice, wheat, and maize are presented. These examples illustrate the practical benefits, such as improved nutritional profiles, extended shelf life, and minimal impact on sensory properties. Additionally, the chapter addresses the challenges and considerations of large-scale implementation of nanoemulsion-based fortification, including cost-effectiveness, consumer acceptance, future perspectives, and nutritional and health aspects. It serves as an interdisciplinary approach, combining nanotechnology, food science, and nutritional biochemistry, to develop innovative and sustainable solutions to combat micronutrient deficiencies globally.