Educational information, not medical advice — ask your doctor or midwife.
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Ferrum metallicum is a homeopathic remedy made from iron metal. Its Latin name is Ferrum. You may also see it called metallic iron.
It is a single remedy, which means it is made from just one starting material. Homeopaths give it to people who look pale and feel weak and tired. It is also used for a flushed face, heavy periods and nosebleeds.
To make it, iron is ground up and then mixed with liquid over and over. Each step makes the mix far weaker. At a strength of 30C, none of the starting iron is left.
Here is the short answer on evidence. Trials have not shown that this remedy works better than a dummy pill (placebo). Iron itself has a long record in medicine, but long use in a tradition is not proof that a remedy works.
There is no known way this remedy could act on the body, and we should say that plainly.
Homeopathy rests on two old ideas. The first is "like cures like": a substance that causes signs in a well person is given in tiny amounts to a sick person with those same signs. The second is that shaking the liquid at each step makes it act more strongly.
The second idea does not fit what we know about chemistry. Once a mix is diluted past about 12C, no molecules of the starting material are expected to be left.
Some makers say the water keeps an "imprint" of the iron. There is no accepted test that shows this. So any change you feel is most likely down to placebo, time, or the care and attention of the visit.
You will mostly find it as small sugar pellets that melt under the tongue.
Other forms include liquid drops in water and alcohol, tablets, and ground powders called triturations.
Common strengths are 3X, 6X, 12C, 30C and 200C. A higher number means the mix was diluted more times, not that it is stronger in the normal sense.
Iron has been used as a medicine for a very long time, in Greek, Arabic, Indian and Chinese practice.
The homeopathic form is much newer. Samuel Hahnemann, a German doctor, set out homeopathy in the early 1800s. Ferrum metallicum was written up in his time and has stayed in homeopathic books ever since.
So it is a long-standing staple of one tradition. That is a record of use, not a record of proof.
See a doctor if you feel tired, weak or pale for more than two weeks, or if you get short of breath doing things that used to be easy.
Book an appointment for heavy periods, frequent nosebleeds, or bleeding that is new for you.
Get urgent help for chest pain, a racing or pounding heartbeat, fainting, black or tarry stools, or blood in your vomit or stool.
Go to an emergency department at once if a child swallows iron tablets of any kind. Take the pack with you.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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