Educational information, not medical advice — ask your doctor or midwife.
Calendula officinalis is the pot marigold, a garden plant with bright orange or yellow flowers. The dried petals are made into creams, ointments, washes and teas. It is used most often on the skin, for minor cuts, grazes, chapping and rashes.
Here is the honest verdict up front. Human trials are few, small and mixed. The best support is for calming irritated skin during radiotherapy, and even that result has not been confirmed by later work.
Long use in a tradition is not proof that something works. It is also not proof that it is safe. This page says where human evidence exists and where it does not.
One naming point matters. Pot marigold is not the same plant as the common bedding marigold, Tagetes. Products should name Calendula officinalis on the label.
No one has shown clearly how calendula acts on human skin. The proposed action is mild soothing of inflammation, plus some support for wound repair.
In cell and animal studies, calendula extracts appear to increase collagen in healing wounds. Collagen is the protein that knits skin back together. Animal wounds also seemed to close faster in some of this work.
Whether any of that happens on human skin is not established. Lab results often fail to carry over to people.
In test tube tests, flower extracts slow the growth of some bacteria and fungi. The effect is weak next to standard antiseptics. Calendula has not been shown to prevent wound infection in people.
Flavonoids and triterpenes from the flower appear to damp inflammation signals in lab models. That is a long way from proof of benefit for a rash on your arm.
Most people meet calendula as a skin cream or ointment. Other forms are easy to find in pharmacies and health shops.
- Creams and ointments, often 2 to 10 percent extract. - Infused oil, made by steeping petals in a plant oil. - Tinctures, an alcohol extract, often diluted for a skin wash.
- Dried petals for a tea or a mouth rinse. - Gels and sprays for minor grazes. - Soaps, lip balms and baby products.
- Homeopathic pills and gels, which are far more dilute and work on a different basis.
Food colouring is another use. Dried petals are sometimes added to rice, soups and salads.
Strength is rarely stated in a way you can compare. Where a product is sold for broken skin, pick one that is sterile or sealed.
Calendula was a well known wound herb in European folk medicine. Written use goes back to the medieval period, with mentions in herbals by writers such as Gerard and Culpeper.
Healers applied it to cuts, burns, boils, chapped skin and sore eyes. It was also taken as a tea for fever, stomach upset and menstrual complaints.
In the First World War era, calendula dressings were reported for battlefield wounds. The plant later entered homeopathy and many national herbal traditions.
It holds a formal traditional registration in parts of Europe for minor skin inflammation. That status rests on long use, not on strong trial data.
Stop using calendula and wash it off if you get a rash, itching or stinging where you applied it.
See a doctor the same day if a wound becomes red, hot, swollen or starts leaking pus. Also go if red streaks spread from the area, or you get a fever.
Get urgent help for swelling of the lips, face or tongue, or any trouble breathing. That is an allergic emergency.
See a doctor if a rash or sore has not improved after about a week, or if a leg ulcer is getting bigger.
In the European Union, calendula flower holds traditional herbal registration for minor skin inflammation and small wounds. That status is based on long use, not on strong trial evidence. In the United States, the United Kingdom and Australia it is sold as an ordinary cosmetic, food colouring or supplement, not as a licensed medicine.
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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