Citrus peels, also known as zests and RINDS, are the outermost layer of the skin of citrus fruits such as lemons, oranges, and limes. They are used to add flavor to dishes, drinks, and desserts. Zests are the colored part of the peel that contains essential oils and can be grated or cut into thin strips. RINDS are the white part of the peel that is thicker and can be used for candying or to make marmalade.