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© Martin Wall
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Botanical name: officinalis
Parts of Calendula used and where is Calendula grown
grows as a common garden plant throughout North America and Europe. The
golden-orange or yellow flowers of calendula have been used as medicine for centuries.
Historical or traditional use of Calendula (may
or may not be supported by scientific studies)
flowers were historically considered beneficial for reducing inflammation, wound healing, and as an antiseptic.
was used to treat various skin diseases, ranging from skin ulcerations to eczema.1 Internally, the soothing effects
of calendula have been used for stomach ulcers
and inflammation. Traditionally, a sterile tea was topically applied in cases of conjunctivitis.
Active constituents of Calendula
Flavonoids, found in high amounts in
calendula, are thought to account for much of its anti-inflammatory activity.2
Other potentially important constituents include the triterpene saponins3 and carotenoids.
Investigations into anticancer and antiviral actions of calendula are continuing. At this
time, insufficient evidence exists to recommend the use of calendula for cancer. Nevertheless, test tube studies have found
antiviral activity for calendula.4 5 The constituents responsible for
these actions are not clear, however, and the relevance of these actions for human health care
has not been established.
How much Calendula is usually taken?
A tea of calendula can be made by pouring 1 cup (250 ml) of boiling water over 1–2
teaspoons (5–10 grams) of the flowers; the tea is then steeped, covered for ten to
fifteen minutes, strained, and drunk.6 At least 3 cups of tea are recommended per
day. Tincture is similarly used three times a day, at 1/4–1/2 teaspoon (1–2 ml)
each time. The tincture can be taken in water or tea. In addition, prepared ointments can be
used topically for skin problems, although wet dressings made by dipping a cloth into the
cooled tea are also effective. Topical treatment for eye conditions is not recommended, as
absolute sterility must be maintained.
Are there any side effects or interactions with Calendula?
Side effects are rare with the use of calendula. Some people may experience a skin rash
with topical use and should be tested to see if they are allergic to the herb.
At the time of writing, there were no well-known drug interactions
with calendula.
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The information presented in Healthnotes is for informational
purposes only. It is based on scientific studies (human, animal, or in
vitro), clinical experience, or traditional usage as cited in each article.
The results reported may not necessarily occur in all individuals. For many of
the conditions discussed, treatment with prescription or over the counter
medication is also available. Consult your doctor, practitioner, and/or
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making any changes in prescribed medications.
References:
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