Boiled eggs boiled in cold water for ten minutes. Cold water in the pot, do not boil too long, otherwise, ferrous ions in the egg yolk will have a chemical reaction with sulfur ions, the formation of ferrous sulfide brown precipitate, which prevents the body's absorption of iron. Boiled eggs do not have to be taken out immediately, 1-2 minutes before taking out, or put in cool boiled water, cold water to cool down 30 seconds, so that it is easy to peel.

Boil eggs in cold water for ten minutes. Cold water in the pot, do not boil too long, otherwise, the ferrous ions in the yolk will have a chemical reaction with the sulfur ions, the formation of ferrous sulfide brown precipitate, thus preventing the human body from the absorption of iron. Boiled eggs do not have to be taken out immediately, 1-2 minutes before taking out, or put in cool boiled water, cold water to cool down for 30 seconds, so that it is easy to peel.