Anthroposophic Medicinal Plants: What Lies Behind Mistletoe, Arnica and More

Maybe there was always an ointment with the yellow arnica flower in the cupboard at home. Maybe someone recommended a herbal remedy with a hard-to-pronounce name for restless nights. Or, after a serious diagnosis, you heard the words mistletoe therapy for the first time.

Somewhere inside you, a question then takes hold: is this medicine, a worldview or both?

The answers often come from two camps. One side says: it is all placebo. The other says: something is happening here that studies simply cannot capture. Both statements are convenient, and both make things too easy.

Behind your question lies a need I understand well. You want to do something good for yourself without being naive. That is why I am not offering you a camp, but a map.

To do this, I look through several lenses: clinical studies, the German S3 guideline on complementary medicine in cancer care, the German Medicinal Products Act and KPNI. KPNI stands for Clinical Psychoneuroimmunology, the interplay of nerves, immune system, hormones and metabolism.

What is anthroposophic medicine, and what makes a medicine anthroposophic?

The word sounds like philosophy, like Waldorf schools, like Rudolf Steiner. That is exactly what unsettles many people. Is this even medicine?

A view of the human being as the starting point

A team led by Kienle from Witten/Herdecke University describes anthroposophic medicine as a multimodal system. It includes medicines, art therapy, eurythmy therapy, rhythmical massage, counselling and special nursing techniques such as therapeutic rubs. According to the team, it is practised in around 80 countries, most widely in Central Europe.

At its centre is a view of the human being with four levels of formative forces and a threefold constitution. You do not have to share this view to follow this article. But it explains why, alongside the diagnosis, a person's constitution and rhythms are also considered.

Incidentally, one idea from it also runs through this blog. The threefold division into thinking, feeling and willing is reflected in the triad I build every section around: feel, understand, act.

What makes a remedy anthroposophic

In Section 4(33), the German Medicinal Products Act describes an anthroposophic medicinal product by three features. It was developed according to the anthroposophic understanding of the human being and nature. It was manufactured using a homeopathic or a special anthroposophic procedure. And it is intended to be used according to these principles.

In practice, this means that very different medicines can be made from the same plant. A plant extract as a gel. A fermented extract for injection. Or a potency, that is, a preparation diluted step by step.

A D6 corresponds to a dilution of one to a million. Imagine one millilitre spread across one cubic metre of water, which is about five full bathtubs. Such remedies are manufactured according to rulebooks such as the German Homeopathic Pharmacopoeia or the Anthroposophic Pharmaceutical Codex.

A lot of research, of varying strength

A view from outside is more sober. In 2004, Ernst from the Peninsula Medical School in Exeter searched for randomised trials testing anthroposophic medicine as a whole system. He did not find a single one that met his criteria. He had deliberately excluded studies on individual remedies, and those are exactly what the rest of this article is about.

If someone recommends an anthroposophic remedy to you, ask about the form first: plant extract, potency or injection? This one question already sorts out a lot.

And now you know why the word anthroposophic on its own tells you nothing yet about whether a remedy works.

How does the German Medicinal Products Act classify anthroposophic medicines?

You turn a pack over and read: without stating a therapeutic indication. This is where many people pause. So what is the remedy for, then?

Two doors into the pharmacy

Imagine two doors. Behind the first, efficacy is assessed. Behind the second, nobody asks about efficacy.

The first door is the marketing authorisation. Under Section 25 of the Medicinal Products Act, it is refused if the stated therapeutic efficacy is lacking or insufficiently substantiated. However, it may not be refused solely because results were achieved in only a limited number of cases. And under Section 22, the medical experience of the therapeutic system concerned must explicitly be taken into account.

The second door is registration. It is open to remedies manufactured using homeopathic procedures, and the law explicitly includes anthroposophic remedies here. The application does not have to contain any information on effects or indications, nor any clinical trials. One requirement is that the use of the active substances as a homeopathic or anthroposophic medicine is generally known.

The pack of such a remedy then carries the sentence that may have puzzled you: “Registriertes homöopathisches Arzneimittel, daher ohne Angabe einer therapeutischen Indikation”, which means registered homeopathic medicinal product, therefore without stating a therapeutic indication. Section 10 of the Act prescribes this for remedies in the register of homeopathic medicinal products.

Commission C: expertise from within the therapeutic system

Germany's Federal Institute for Drugs and Medical Devices has its own expert commissions for the special therapeutic systems. Commission C is responsible for anthroposophic medicines, Commission D for homeopathic and Commission E for herbal ones. Under the Medicinal Products Act, the responsible commission is involved in certain decisions. In this way, expertise from each system feeds into the authority's work.

Next time, take a look at the pack: does it state an indication, or the note on registration? And ask whether it is a plant extract or a potency.

And now you know why two preparations from the same plant can be two entirely different things in legal terms.

What does research show on mistletoe therapy in cancer?

After a cancer diagnosis, many people want to do something themselves. Not just keep appointments, but actively shape their care. Often, one word then comes up: mistletoe.

An approach rooted in anthroposophy

Mistletoe therapy for people with cancer has its origins in anthroposophic medicine. Today, it is one of the most frequently prescribed complementary therapies in cancer care in Central Europe. A whole extract of mistletoe is injected under the skin, fermented or non-fermented depending on the manufacturer.

Through the KPNI lens, mistletoe is above all a stimulus for the immune system. Redness often appears at the injection site, and sometimes body temperature rises slightly. Researchers from Berlin interpret such reactions as an expected consequence of mistletoe's immune-stimulating properties.

This is where a very human error in reasoning is tempting. If the body reacts visibly, something must surely be happening. Yes, something is happening. But a reaction is not yet a benefit.

What the major reviews say

A research group led by Ernst had already arrived at a similar picture in 2003. Among ten randomised trials, it was mainly the methodologically weaker ones that pointed to a benefit, especially for quality of life. None of the methodologically stronger trials showed efficacy, neither for quality of life nor for survival.

Two reviews, two readings

It gets interesting when you put more recent reviews side by side. They draw on a similar body of studies and still reach opposite conclusions.

How can that be? Anyone who selects, weights and rates studies makes many small decisions. Each of them can shift the result. On top of that comes a problem that weighs particularly heavily with mistletoe: blinding.

Imagine a taste test in which one variety clearly fizzes. Anyone tasting it quickly guesses what is in the glass. With mistletoe, the reddened injection site is that fizz.

The trial that wanted to know for sure

An open-label trial from Serbia had reported better quality of life with mistletoe in advanced pancreatic cancer.

A Swedish team wanted to test exactly this hope with the gold standard of clinical research: double-blind and with placebo. It is worth noting who took part. The authors also included Kienle from the Freiburg Center for Complementary Medicine, who has herself been publishing on anthroposophic medicine for years.

In 2026, the team followed up with the detailed analysis of quality of life. Here too, there were no differences, neither in quality of life nor in body weight. In the blood, only the eosinophilic granulocytes, a group of white blood cells, rose with mistletoe, without any link to a clinical effect. The researchers write that there is no clinical reason to recommend mistletoe extract in advanced pancreatic cancer.

And survival?

This is where the analyses diverge most widely. A meta-analysis from Witten/Herdecke on the fermented mistletoe preparation Iscador reached a positive result, but it rests exclusively on non-blinded studies. A Berlin meta-analysis on non-fermented preparations also found signs of a benefit. As soon as studies with active comparison treatments were included, it was no longer significant.

The Jena review, by contrast, found no effect on survival in most studies, especially not in the high-quality ones. And MISTRAL, the double-blind trial, saw no difference.

How well tolerated is mistletoe?

Rare but serious reactions do still occur. A case report from the university dermatology clinic in Freiburg describes grade II anaphylaxis, a whole-body allergic reaction, after a mistletoe injection. So if you have shortness of breath, circulatory problems, a widespread rash or swelling of the face: call the emergency number 112 immediately.

If you are considering mistletoe therapy, take the question to your oncology team. Ask about the goal, about possible interactions with your current treatment, and about how you would recognise together whether it is doing you good.

And now you know why mistletoe is not a yes-or-no topic, but a weighing-up that belongs in oncological hands.

Arnica as a gel or as globules: what do the studies show?

You bump into the edge of the table, and someone is already reaching for the arnica. For many people, it is the household remedy par excellence. But not all arnica is the same.

The plant in the tube

Arnica, botanically Arnica montana, belongs to the daisy family. Its flowers contain sesquiterpene lactones, a group of chemically reactive plant compounds.

In 1998, a Freiburg research group led by Lyss had shown how this might work. In cell cultures, the related substance helenalin directly altered one component of this switch, the p65 subunit. Imagine chewing gum in a light switch: it sticks, no matter how often someone presses it.

The Cochrane review by Cameron and Chrubasik rates this study as moderate-quality evidence. According to the review, arnica gel probably eases symptoms about as well as an ibuprofen gel. On side effects, however, it did no better, and possibly even slightly worse.

The plant as a potency

Potentised arnica, for example as globules, is a different question. Most studies on it come from homeopathy, whose potencies are manufactured using procedures similar to those for anthroposophic potencies.

In 1998, Ernst and Pittler from the University of Exeter found eight placebo-controlled trials. Most had serious methodological flaws. Overall, they did not suggest that homeopathic arnica does more than a placebo.

The mechanism shown in the lab depended on the amount of sesquiterpene lactones. In a D6, this amount is diluted by a factor of one million. Whether enough is then left to measurably slow the inflammation switch is questionable. A scientifically established mechanism for high potencies has not been described so far.

One point that applies to every arnica on the skin

One issue affects every arnica applied to the skin: allergies. A review from the Danish allergy research centre counts the daisy family among the important triggers of allergic contact eczema in Europe. According to the review, sensitisation to arnica is relatively common. The European Medicines Agency lists itching, redness and eczema as possible side effects.

For a bruise or sprain, an arnica preparation for the skin can be an option for a few days. The European Medicines Agency provides for use from the age of twelve. If symptoms last longer than three to four days or get worse, it recommends medical advice. Severe pain, marked swelling or a suspected fracture should be checked by a doctor in any case.

What other plants show for joint pain is covered in Turmeric for osteoarthritis. Why movement remains the foundation is explained in Exercise for osteoarthritis.

And now you know why arnica is not a matter of belief, but a question of which form you are holding in your hand.

Bryophyllum and calendula: what lies behind the classics?

It is two in the morning. Your body is tired, your head is not. For nights like these, anthroposophic medicine often uses a remedy made from a plant whose name hardly anyone can pronounce fluently.

A succulent from Madagascar

Bryophyllum pinnatum, also called Kalanchoe pinnata, is a succulent from Madagascar. In 2016, a team led by Fürer and Potterat from the University of Basel summarised what it is used for in anthroposophic medicine. These are so-called states of overactivity such as restlessness, sleep disorders and preterm labour.

The team also points to bufadienolides in the plant, substances that can be potentially toxic. That is one reason why even a herbal remedy belongs in expert hands.

The S3 guideline on complementary medicine considers the data on bryophyllum for fatigue and sleep disorders in cancer patients insufficient. It therefore makes no recommendation for or against it.

In the lab, it gets even more complicated. On muscle strips from pig bladders, the pressed juice of the leaves actually strengthened muscle contraction. Individual fractions containing bufadienolides or flavonoid building blocks, on the other hand, weakened it. So the plant is not a single active ingredient but a mixture whose components can pull in different directions.

Bryophyllum has also been tested in obstetrics. Two randomised trials in Switzerland on suppressing preterm contractions were stopped early, so hardly any robust conclusion about efficacy can be drawn from them. Preterm labour always belongs in medical hands, ideally directly in a maternity hospital.

Calendula: two studies, two results

Pot marigold, or calendula, is a skincare classic. In a Berlin study in the practices of anthroposophic doctors, it was among the most frequently prescribed daisy-family remedies, alongside chamomile and arnica. Among other things, it has been studied for skin irritation from radiotherapy after breast cancer surgery.

The first study used a comparison product whose own benefit for this purpose had not been demonstrated. The second, blinded study found no difference from a plain cream. Calendula can be a pleasant skincare product. Whether it protects the skin during radiotherapy better than a simple cream remains open on the basis of these data.

With sleep problems, it is worth looking at the basics first. You can find ideas in 4-7-8 breathing for falling asleep and in Valerian and passionflower for sleep disorders.

And now you know why a classic from the home medicine cabinet does not necessarily have solid evidence behind it.

How safe are anthroposophic medicines?

Natural means harmless, right? Many people think so, especially with globules and ointments. It is not quite that simple.

A second analysis led by Jong used the reporting databases of four manufacturers from 2010 to 2017. Reported side effects were rare overall, but clearly more frequent after injections than after tablets or external remedies. Inflammation at the injection site was reported most often. The researchers themselves stress that such spontaneous reports cannot be compared directly with study data.

There are separate data for the daisy family. In the Berlin study led by Jeschke, 18,830 people received remedies containing daisy-family extracts, most often chamomile, calendula and arnica. No serious side effects were reported for them. Still, an allergy to the daisy family remains a point you should know about, including with echinacea.

Honesty requires one more point. The large safety analyses come mainly from research institutions close to anthroposophic medicine. That does not make them worthless. Independent data would still be desirable.

And now you know why natural means neither automatically harmless nor automatically dangerous.

Where does evidence end, and where does experience begin?

Maybe you are thinking now: but the globules did me good. Or: my mother swears by her mistletoe therapy. These experiences are real. The only question is what exactly they show.

Kienle's team itself writes that randomisation and blinding were often rejected by anthroposophic doctors and their patients. That makes rigorous studies harder. MISTRAL shows that they are possible nonetheless.

It is also worth noting that the S3 guideline does not make blanket judgements. For a multimodal anthroposophic treatment programme with psychoeducation and sleep education, eurythmy therapy and painting therapy, it issues a “may” recommendation for fatigue and sleep disorders after breast cancer. For other anthroposophic treatments, it makes no recommendation for or against with regard to quality of life.

Four lenses on three plants

Mechanistically plausible means: there are understandable biological pathways, but no proof in humans yet. Through the KPNI lens, it looks like this.

What is established, and what is not?

Here I separate what studies in humans show, what is mechanistically plausible and what rests mainly on tradition and experience.

I also show you how to read studies on medicinal plants in general in Adaptogens explained. You can find a similarly critical look at another popular topic in Detox regimes under scrutiny.

And now you know why your experience counts and is still no substitute for a fair comparison.

Three levers if you want to use anthroposophic remedies

You do not have to pick a camp. You can take a targeted approach. These three steps are not a therapy, but a sequence I consider sensible.

If you nod at one of these points, that is no reason to worry. It is a good reason for a conversation before you start a remedy. How carefully even plants should be weighed up during pregnancy is shown by the example of Ginger for nausea in pregnancy.

And now you know why the most respectful way to approach anthroposophic medicinal plants is an honest one.

Frequently asked questions about anthroposophic medicinal plants

Where else this topic comes into play

Joints, sleep, allergies and a critical look at popular remedies are cross-cutting topics. These articles approach them from other directions.