The explanation â the true one (if ever found) â does matter. It may matter to future whales, potentially, especially if we learn that 52 Hertz (âAliceâ, as in Cooper) got the way s/he did because of us, because of something we humans were/are doing.
Because of this health risk with high iron intake, the Institute of Medicine has set a Tolerable Upper Intake Level, or UL, for iron. This is the highest amount of iron that can be taken daily with a low risk for developing overload. For males and females over 14 years old, the UL for iron is 45 milligrams per day.
1 Between 19 and 50 years of age, you should get 18 milligrams of iron a day.  Pregnancy â During pregnancy you need more iron and should get 27 milligrams a day. Some women suffer from anemia and need even more iron, up to 60 milligrams a day as directed by their doctor.