Zinc and iron deficiencies are a big problem for many people, especially in developing countries. These deficiencies can cause serious health issues like brain problems, infections, and anemia. One way to fix this is by growing crops that have more zinc and iron in them. Scientists have been working on breeding new types of crops that are rich in these nutrients. They have also found that adding certain fertilizers to the soil can help increase the amount of zinc in the grains. However, adding iron fertilizers doesn't seem to work as well. Overall, improving the nutrients in crops through breeding and fertilizers can help fight against zinc and iron deficiencies in both people and crops.