Educational information, not medical advice — ask your doctor or midwife.
Cedrón is the dried leaf of Aloysia citriodora, a shrub better known in English as lemon verbena. The leaves have a strong, clean lemon smell. In Latin America they are brewed as a hot tea.
People drink it after meals, for a heavy or gassy stomach, or to wind down at night. It is also used to flavour drinks, syrups and desserts. Most of its use is as a daily tea, not as a medicine.
The short verdict on proof: human trials are few, small, and mostly done with strong extracts rather than tea. Long use in homes is not proof that it works, and it is not proof that it is safe.
No one has shown how cedrón acts in the body once you drink it.
In test tubes, its oils and plant compounds mop up free radicals (unstable molecules that can damage cells). In animal studies, extracts have relaxed gut muscle and slowed cramping. Whether a cup of tea does the same in you is not known.
Lab work also points to a mild effect on pain and swelling signals. A few small human trials used concentrated extracts in capsules. Those amounts are far above what a teapot can give.
Part of what people feel may be simpler than chemistry. A warm, caffeine-free drink can settle a tense stomach and mark the end of the day.
Cedrón is sold and used in several forms:
- Loose dried leaf, brewed as a hot tea - Tea bags, alone or blended with mint, chamomile or anise - Fresh leaves from a garden plant, steeped in hot water - Capsules of lemon verbena extract, sometimes paired with fish oil for joint products - Liquid tinctures in alcohol - Essential oil, sold for scent and massage blends
The tea and the essential oil are not the same thing. The oil is far more concentrated and is not a drink.
Cedrón grows wild in Argentina, Chile, Peru, Bolivia and Uruguay. Spanish travellers took it to Europe in the 1700s, where it was grown for perfume.
In Latin American home medicine it was given as a hot tea for nerves, upset stomach, gas and trouble sleeping. It was also added to cold and cough brews, often with honey or lime.
In Peru and Ecuador the name hierba luisa is more common than cedrón. In some countries cedrón refers to a different plant, so labels can be confusing.
Get emergency help if your lips, tongue or face swell, or if you struggle to breathe after taking it. That can be a serious allergic reaction.
Stop and see a doctor if you get a rash, ongoing nausea, or pain in your side or lower back.
See a doctor rather than carrying on with tea if stomach trouble lasts more than two weeks, if you are losing weight, if you are vomiting blood, or if poor sleep has gone on for a month.
In the United States, lemon verbena leaf is sold as a food, a herbal tea and a dietary supplement. It is not approved as a drug for any condition.
In the UK and the EU it is sold as a food and herbal infusion, not as a licensed medicine. In much of Latin America it is an everyday market herb.
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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