Educational information, not medical advice — ask your doctor or midwife.
Lady's bedstraw is a small wild plant with clouds of tiny yellow flowers. It grows in dry meadows, pastures and dunes across the Nordic countries and most of Europe. Its Nordic names are gulmaure, gulmåra and keltamatara.
The flowering tops and leaves are dried for tea or for a skin wash. Farmers once used the plant to curdle milk for cheese and to dye wool yellow. It was also stuffed into mattresses, which is where the English name comes from.
In folk use it was mainly a "flushing" tea and a wash for sore skin. Human evidence for any of that is very thin. Long use in a tradition is not proof that a plant works, and not proof that it is safe.
No one has shown what lady's bedstraw does inside the human body. The ideas below come from the laboratory, not from people.
In test-tube work, extracts of the plant mop up free radicals (unstable particles that can damage cells). Some lab studies also show mild activity against certain bacteria and fungi. Whether any of that happens in a person who drinks the tea is unknown.
The plant carries iridoids, a group of bitter plant compounds. In animal studies, related iridoids calm swelling and may make the gut move. Animal results often do not carry over to people.
The old "flushing" use assumes the tea makes you pass more urine. That effect has not been measured properly in humans. Part of any extra urine would simply come from drinking a lot of warm liquid.
Most people meet it as a loose dried herb for tea. Common forms are:
- Dried flowering tops, loose or in tea bags.
- Tincture, the herb soaked in alcohol.
- A cooled brew used as a skin wash or compress.
- Capsules of dried powder, which are uncommon.
- Fresh flowering tops, used traditionally in cheese-making and dyeing.
Quality varies a lot between sellers. Buy from a supplier that names the plant as Galium verum on the label. Closely related plants, such as cleavers and woodruff, are sometimes mixed in.
Lady's bedstraw was a farm plant before it was a medicine plant. Nordic households dried it for mattresses and used it to set and colour cheese. The flowering tops also gave a yellow dye, and the roots a red one.
Folk healers in Norway, Sweden and Finland brewed the dried herb as a tea for swollen legs and for trouble passing water. A cooled brew was laid on sores, burns and itchy skin. Some old sources list it for fits and for nerves.
None of these uses was tested. They are recorded here as history, not as a plan to copy at home.
Stop using it and see a doctor if you feel worse, or if nothing improves within a few days.
Get medical help the same day for:
- Fever, chills or back pain with burning urine - Blood in your urine - Swelling in one leg, or swelling that comes on fast - Yellow skin or eyes, or dark urine - A spreading rash
Call emergency services for swelling of the lips, tongue or throat, or trouble breathing.
In the EU and the Nordic countries it is sold as a herbal tea or food supplement. It is not approved as a medicine, and it has no European Medicines Agency monograph. In the United States it is sold as a dietary supplement, which means it is not reviewed to treat any illness.
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 Lady's bedstraw 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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