How Much Iron Is Too Much

At high doses, iron is toxic. For adults and children ages 14 and up, the upper limit — the highest dose that can be taken safely — is 45 mg a day. Children under age 14 should not take more than 40 mg a day.

What happens if iron levels in the body are too high?

Excess iron builds up the heart, liver, joints, pancreas, and pituitary gland. If untreated, it can cause organ damage, and lead to a heart attack, diabetes, cirrhosis of the liver, arthritis, depression, and premature death.

Can too much iron make you dizzy?

Iron supplements can cause side effects like dizziness, fainting, and hives. Too many iron supplements can cause long-term side effects like liver damage and heart disease. If you want to take iron supplements, talk to your doctor about finding the proper dosage for you.