Educational information, not medical advice — ask your doctor or midwife.
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Masterwort is the root of an Alpine mountain plant, Peucedanum ostruthium. German speakers call it Meisterwurz, which means "master root". Folk healers in the Alps used the bitter root for weak digestion, colds, aches and wounds.
You will mostly meet it as dried root, a tincture, or a herbal schnapps. It also flavours some Alpine cheeses and bitter liqueurs. Ointments and poultices were a common folk form.
Here is the honest verdict on evidence. There are almost no human trials of masterwort for any health use. Nearly everything known comes from test tubes and animals.
Long use in European folk medicine is not proof that it works. It is also not proof that it is safe. The root does carry one real hazard: it can make skin burn badly in sunlight.
No one has shown what masterwort does inside the human body. The ideas below come from lab work and from old folk reasoning.
The root is strongly bitter. Bitter plants have long been used to prompt saliva and stomach juices before a meal. That effect is plausible for bitters in general, but it has not been measured for masterwort itself.
In test tubes, the root's coumarins slow some bacteria and damp down markers of inflammation. In animal and cell work, osthole and related compounds appear to relax smooth muscle, such as gut and airway muscle. Whether any of this happens at the amounts a person takes is unknown.
One mechanism is well understood, and it is a risk rather than a benefit. Furanocoumarins soak up ultraviolet light from the sun. When they sit in skin and sunlight hits them, they can damage skin cells and cause burns or blisters.
Lab studies also suggest these compounds block CYP3A4, a liver enzyme that breaks down many prescription drugs. Grapefruit works in a similar way. This has not been tested with masterwort in people, so the size of the effect is unclear.
Masterwort is sold mainly as the dried root and as products made from it.
Common forms include:
- Dried cut root, for a tea or decoction - Alcohol tincture, taken in drops - Herbal schnapps and bitter liqueurs - Root powder in capsules, less often - Ointments, oils and poultices for skin - A flavouring in some Alpine cheeses and spirits
The fresh plant is still dug by hunters and farmers in parts of Austria, Switzerland and Italy. That practice carries a serious risk. Several deadly plants in the carrot family look similar in leaf, so wild picking is a job for an expert and not for a beginner.
Quality control is weak. Few products are standardised, and some sold as "masterwort" are a different plant, Astrantia major, which shares the English name.
Masterwort was one of the best-known farm remedies of the Alps. Its German name, Meisterwurz, hints at the high standing it once had.
Medieval and early modern herbals listed it for plague, fever and poor digestion. Alpine households kept the root in the kitchen and in the barn. It was also given to cattle and goats, and was carried as a charm against illness and bad luck.
Later European herbal books described it as a warming bitter and a sweat-promoting remedy for colds. None of these uses was tested by modern methods, and the page does not endorse copying them.
Stop using masterwort and speak to a doctor if you get a rash, redness or blisters on skin that has been in the sun. Burns of this kind can be severe and may need treatment.
Seek urgent care if you have swelling of the lips, face or throat, a widespread rash, or trouble breathing. These are signs of a serious allergic reaction.
Also stop and get advice if you have lasting stomach pain, vomiting, or yellowing of the skin or eyes.
Tell your doctor you have taken it. Do not use it instead of care for a fever, a chest infection or a wound that is not healing.
Masterwort is not an approved medicine in the UK, the EU or the US. It is sold as a food flavouring, a herbal tea or a supplement, and it is a traditional ingredient in Alpine spirits.
The wild plant is protected in parts of the Alps, so digging it up may be against local law.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Masterwort is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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