What is Ferrum metallicum?

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.

How does Ferrum metallicum work?

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.

What forms does Ferrum metallicum come in?

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.

Where it comes from:

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.

What does Ferrum metallicum help with?

• Tiredness and weakness linked to low iron: This is the best known homeopathic use for Ferrum metallicum. The picture homeopaths look for is a person who tires fast, looks pale, and feels better moving slowly than sitting still. No human trial has tested the remedy for this. If you are tired for more than two weeks, ask your doctor for a blood test. Real iron deficiency needs real iron, not a 30C dilution.
• Pale skin with a face that flushes easily: Homeopathic books describe a pale person whose face goes red at the smallest effort or upset. This is a traditional prescribing picture only. There is no trial evidence behind it.
• Heavy or long menstrual periods with exhaustion: Homeopaths use it when heavy bleeding leaves a woman worn out and pale. No published trial supports this. Heavy bleeding can have causes that need treatment, such as fibroids (growths in the womb) or a thyroid problem, so get it checked.
• Nosebleeds: Traditional homeopathic use covers easy nosebleeds in a pale, weak person. There is no trial evidence. Frequent nosebleeds should be looked at by a doctor, above all if you take blood-thinning medicine.
• Shortness of breath when you move about: This appears in the old remedy pictures alongside pallor and weakness. It has not been tested in people. Breathlessness can point to heart, lung or blood problems, so please see a doctor first rather than self-treating.
• Poor appetite, or vomiting soon after eating: Homeopathic texts describe food coming back up soon after a meal. This is tradition, not trial evidence. Ongoing vomiting needs a medical check.
• Cold hands and feet: Listed in homeopathic books as part of the overall picture for this remedy. No human studies have looked at it.

Which foods are rich in Ferrum metallicum?

1. Red meat and liver: the richest food sources of iron your body absorbs easily
2. Shellfish such as mussels and clams: high in well-absorbed iron
3. Lentils, beans and chickpeas: good plant sources of iron
4. Spinach and other dark leafy greens: useful iron, though harder to take up
5. Fortified breakfast cereals: iron is added during making
6. Pumpkin seeds and dried apricots: handy snack sources

Practical Tips:

These foods give you real dietary iron, which is not the same thing as the homeopathic remedy; vitamin C at the same meal helps your body take up iron from plants.

What are the side effects of Ferrum metallicum?

• No effects at all, which is the usual result at 12C and above
• A short flare of your symptoms, which homeopaths call an aggravation
• Stomach upset or wind from the milk sugar (lactose) in the pellets
• Rare rash or itching, most likely to the carrier rather than the iron
• Mild stomach upset or dark stools with very low potencies such as 3X, if taken often
• Delay in getting a real diagnosis, which is the most serious risk of all

Good to know:

Direct side effects are rare. At 30C there is nothing left of the iron, so the pellets act like sugar.

The real danger is not the remedy itself. It is using it in place of a proper check-up and proper treatment. Tiredness, pallor and heavy bleeding can come from causes that get worse while you wait.

Low-potency iron products (3X, 6X) may hold faint traces of iron. Keep all iron products well away from children, because swallowing a lot of iron tablets can harm a child badly.

How much Ferrum metallicum should you take?

• Recommended daily: No dose has been set by research, because no good trials exist. In homeopathic practice, a common home approach is 3 to 5 pellets of a 30C strength, two or three times a day. Some people use 6X tablets more often. Follow the label on the pack you buy, or the advice of a qualified practitioner. Higher potency numbers such as 200C are usually left to practitioners.
• Best time of day: Any time of day. Homeopathic custom is to take it away from meals, coffee, mint and strong flavours, by about 15 to 30 minutes. This is a tradition rather than a proven rule.
• With or without food: Usually taken on an empty mouth, between meals. Let the pellets melt under your tongue instead of swallowing them whole.
• Time to effect: There is no reliable answer, since the remedy has not been shown to work better than placebo. Homeopaths expect a change within hours to a few days.
• How long to take it: Homeopaths usually suggest a short trial of a few days for a sudden problem. Stop and think again after about a week if nothing has changed. Do not keep taking it for months for tiredness that has not been looked into. See a doctor if the symptom lasts more than two weeks.