Iron and zinc are important nutrients found in grains like wheat, rice, and maize, but these grains often don't have enough of these nutrients. Scientists are working on ways to increase the levels of iron and zinc in grains using new technologies like genome editing. Some wheat varieties have been successfully developed with higher zinc levels, but there have been challenges with increasing iron levels. Traditional breeding methods have not been as successful in increasing iron levels in rice. Transgenic approaches have helped improve iron and zinc levels in grains, but they have limitations. The use of CRISPR-Cas9 technology can help increase iron and zinc content in grains without causing other issues. It is important to use these new technologies to improve the nutrient content of grains, especially in countries where malnutrition is a problem.