Because iron excess has a direct influence on adrenal function, it may result in alterations in some stress hormones. Studies have shown that increased iron stores are associated with decreased levels of cortisol and increased levels of prolactin. This suggests that high iron levels can lead to lower stress-response hormones. Excess iron can also cause problems by binding to other substances in the body and preventing them from doing their job. For example, extra iron binds to testosterone so that it doesn't reach its target cells. This can lead to low testosterone levels. Extra iron can also bind to adrenaline or cortisol so that no response is needed! It is important for people who use steroids or other drugs that can alter mood or behavior to avoid taking iron supplements because they can increase the amount of drug in your blood stream. Drugs used to treat depression or anxiety can be taken together with iron supplements without causing harm but with too much iron you can build up a store of unneeded reserves of these metals in the body. As we have seen, iron is needed for healthy skin, blood, immune system, muscle contraction, and the production of hormones. Too much iron can be toxic to the body though; therefore, it is important to know your total iron status through testing to make sure you do not have an iron overload.