Educational information, not medical advice — ask your doctor or midwife.
Linden, or lime blossom, is the dried flower of the small-leaved lime tree, Tilia cordata. It is drunk as a mild, sweet-smelling tea. People reach for it for colds, restlessness and trouble getting to sleep.
The tree grows across much of Europe. The flowers are picked in early summer with their pale, leaf-like bract still attached. That bract is counted as part of the herb.
Here is the honest verdict. Linden has a long and steady place in European home use, but good human trials are few. Long use is not proof that something works, and it is not proof that it is safe.
That said, linden tea has a mild safety record. Most people drink it without trouble. The main real risk is an allergic reaction in people who react to linden pollen.
Nobody has shown clearly how linden works in people. The ideas below come mostly from lab and animal work, plus simple physics.
The flowers hold mucilage, a slippery plant gum. It is thought to coat a sore throat and ease a dry, tickly cough. This is a plausible soothing effect, not a proven drug action.
Linden is rich in flavonoids, a group of plant pigments. In animal studies, extracts of Tilia species have shown mild calming and sleep-promoting effects. Whether a cup of tea does the same in a person is not established.
Folk use calls linden a sweating tea for fevers. Much of that is likely the hot water itself. Any hot drink can make you sweat and feel better for a while.
In test tubes, linden extracts show some antioxidant and germ-slowing activity. These findings do not tell you what happens in your body after a drink.
Linden is sold in a few simple forms.
Dried loose flowers with bract are the traditional form. Tea bags of the same material are widely sold in Europe.
Liquid extracts and tinctures in alcohol exist but are less common. Syrups and cough blends often include linden with other herbs.
Linden honey is a food, made by bees working the flowers. It is not a medicine, though it shares the smell.
A linden fragrance oil or absolute is sold for perfume. It is not meant for drinking.
Linden was a village tree in much of Europe. In Serbian and Croatian it is lipa, in Romanian tei, in Bulgarian липа. Meetings, courts and markets were held under big lime trees.
Home use was mostly for winter illness. Hot flower tea was given for colds, chills, coughs and fevers, often to bring on a sweat.
It was also a bedtime drink. Parents gave it to fretful children, and adults drank it for nerves and poor sleep.
German health authorities later listed linden flower for colds and cold-related coughs, based largely on this long record of use.
Stop and get emergency help if your face, lips or throat swell, or you have trouble breathing. That can be a serious allergic reaction.
See a doctor if cold symptoms last more than about a week, or if you get short of breath.
See a doctor if a fever goes above 39C, lasts more than three days, or comes with a stiff neck or rash.
See a doctor if poor sleep or anxiety lasts for weeks. Linden is not a treatment for either.
In the European Union, linden flower is sold as a food and as a registered traditional herbal medicine for cold symptoms. That registration rests on long use, not on trial data. In the United States it is sold as a herbal tea or supplement and is not approved by the FDA to treat any illness.
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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