Additionally, an egg contains a wide variety of nutrients, including pantothenic acid, phosphorus, potassium, calcium, iron, and magnesium, as well as the vitamins A, E, D, and K, as well as B2 and B12. Lutein, another essential component of eggs, benefits our eyes by shielding them from UVA and UVB harmful rays and enhancing our vision. Lecithin can also be found in egg yolk.