Educational information, not medical advice — ask your doctor or midwife.
Calendula is a bright orange garden flower used on the skin. People apply it to minor cuts, grazes, chapped skin and rashes. It comes as creams, ointments, infused oils, tinctures and mouth rinses.
The short evidence verdict: human trials exist, but they are small and mixed. Some suggest a modest help with skin irritation and wound care. None show a cure, and the results are not firm.
The plant used in medicine is Calendula officinalis, also called pot marigold. It is not the same as the French or African marigolds (Tagetes) sold for flower beds. Check the Latin name on the label.
Calendula has a long record in European folk practice. Long use tells you a plant is familiar and usually well tolerated. It does not prove the plant works, and it does not prove it is safe for everyone.
No one has shown exactly how calendula acts on human skin. Most of what is claimed comes from laboratory and animal work.
In animal tests, certain fatty compounds in the flower (faradiol esters) reduce swelling. In cell and animal wound models, calendula extracts appear to speed the growth of new tissue and small blood vessels. Whether that happens on a real cut is not established.
In test tubes, calendula extracts slow some bacteria and fungi. This is a weak effect in a dish. It should not be read as treating a skin infection.
The plant is also rich in antioxidant pigments and flavonoids. These mop up reactive molecules in lab conditions. How much of that reaches living skin is unknown.
Most calendula is used on the skin, not swallowed.
Common forms include:
Creams, ointments and balms, usually with a stated percentage of extract.
Infused oil, made by steeping petals in a plant oil.
Tincture, an alcohol extract, often watered down before use.
Dried petals for a tea, a skin wash, a compress or a mouth rinse.
Gels, lip balms, nappy creams and baby products.
The petals also appear in food as a mild colouring and salad garnish. That use is culinary, not medicinal.
Oral capsules exist but are far less studied than skin products. There is little human data to support swallowing calendula.
Calendula has been grown and used in Europe since at least the Middle Ages. Herbals of the 16th and 17th centuries listed it for wounds, sores and inflamed skin.
Writers such as Culpeper recorded it for skin complaints and for fevers. Folk practice used petal washes for sore eyes and inflamed gums. A petal ointment was a common household item for scrapes.
It was reported as a field dressing herb during several European wars. Soldiers' wounds were packed with the flowers when supplies ran short.
The flower also carried a calendar role, as it opened with the sun, which is where the name comes from. None of this history is a reason to treat a wound yourself. It explains only why the plant stayed in use.
Stop using it and see a doctor if:
A rash, itching or burning starts where you applied it.
A wound is not clearly better after about two weeks.
The area becomes hot, swollen, red or starts to leak pus.
You develop a fever or feel unwell with a skin wound.
Mouth soreness gets worse instead of better.
Get emergency help at once if your lips, face, tongue or throat swell, or if you struggle to breathe. That is a severe allergic reaction.
In the European Union, calendula flower is registered as a traditional herbal medicine for minor skin inflammation and for mouth and throat irritation. That registration rests on long use, not on proof from trials.
In the United States and the United Kingdom, it is sold as a cosmetic, a supplement or a food colouring. It is not approved there as a drug for any disease.
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.
One email with the summary. We'll also send a short weekly evidence update — unsubscribe any time.
