Marigold (Calendula) – Benefits and Uses
The marigold (Calendula officinalis) is a medicinal plant with anti-inflammatory and wound-healing properties that has been used in natural medicine for centuries.
Things worth knowing about "Marigold"
The marigold (Calendula officinalis) is a medicinal plant with anti-inflammatory and wound-healing properties that has been used in natural medicine for centuries.
What is the Marigold?
The marigold (Calendula officinalis), also commonly known as the pot marigold, is one of the best-known medicinal plants in the Western herbal tradition. It belongs to the daisy family (Asteraceae) and is native to the Mediterranean region. Its vibrant orange and yellow flowers have been used since the Middle Ages to treat skin complaints, wounds, and inflammation. Today, marigold is a recognized component of phytotherapy and is found in numerous medicinal preparations, ointments, creams, and cosmetic products.
Active Compounds and Mechanism of Action
The healing properties of marigold are attributed to its diverse range of bioactive constituents:
- Flavonoids (e.g., isorhamnetin, quercetin): provide antioxidant and anti-inflammatory effects
- Triterpenoids (e.g., oleanolic acid, ursolic acid): promote wound healing and exhibit antimicrobial properties
- Carotenoids (e.g., lutein, beta-carotene): protect cells from oxidative stress and support skin regeneration
- Essential oils: contribute antimicrobial and anti-inflammatory effects
- Polysaccharides: support immune function and tissue repair
- Saponins: contribute to the anti-inflammatory activity
Together, these compounds inhibit pro-inflammatory signaling pathways (including COX and LOX enzymes) and stimulate fibroblast proliferation, which accelerates wound healing.
Traditional Use
Marigold has been used as a medicinal plant since at least the 12th century and has a long history in European folk medicine. Traditional applications included:
- Minor wounds, abrasions, and burns
- Skin irritations and eczema
- Insect bites and stings
- Inflammation of the oral mucosa
- Muscle pain and bruising
Medical Applications
Topical Use
The best-evidenced application of marigold is the topical treatment of skin conditions. Preparations such as Calendula ointment, cream, or tincture are used for:
- Poorly healing wounds and ulcers
- Dermatitis and skin irritations
- Radiation dermatitis (skin damage from radiotherapy)
- Diaper rash in infants
- Dry and irritated skin
Internal Use
As a tea or tincture, marigold is taken internally to relieve gastrointestinal complaints such as gastritis, cramps, and mucosal inflammation. It is also traditionally used to ease menstrual discomfort.
Recommended Dosage and Forms
Marigold is available in various forms:
- Ointment/Cream: preparations containing 2-5% Calendula extract, applied to affected skin areas several times daily
- Tincture: diluted for compresses or rinses (typically 1:3 to 1:5 with water)
- Tea: 1-2 teaspoons of dried flower petals per cup of hot water, 2-3 times daily
- Oil: Calendula macerated oil for sensitive skin care and massage
Official dosage recommendations from the European Pharmacopoeia and ESCOP (European Scientific Cooperative on Phytotherapy) suggest 1-4 g of dried flowers per cup for infusions.
Safety and Side Effects
Marigold is generally considered well tolerated. Possible adverse effects include:
- Allergic reactions: People with allergies to plants in the daisy family (e.g., chamomile, arnica, chrysanthemums) may experience cross-reactions to Calendula
- Contact dermatitis: Rarely reported with topical use
- Pregnancy: Internal use should be avoided during pregnancy, as uterine-stimulating properties have been discussed
Caution is advised for individuals with known allergies to the Asteraceae family. Medical advice should be sought before use in young children or when taking other medications.
Scientific Evidence
Clinical studies particularly support the effectiveness of Calendula preparations in treating radiation-induced dermatitis and in promoting wound healing after surgical procedures. A randomized trial demonstrated that Calendula ointment was superior to trolamine in reducing acute dermatitis in breast cancer patients undergoing radiotherapy. Further studies confirm antimicrobial and antifungal properties of Calendula extracts.
References
- European Medicines Agency (EMA): Assessment report on Calendula officinalis L., flos. EMA/HMPC/179281/2009, London, 2008.
- Pommier P. et al. - Phase III randomized trial of Calendula officinalis compared with trolamine for the prevention of acute dermatitis during irradiation for breast cancer. Journal of Clinical Oncology, 22(8), 2004.
- Muley B.P., Khadabadi S.S., Banarase N.B. - Phytochemical constituents and pharmacological activities of Calendula officinalis Linn. Tropical Journal of Pharmaceutical Research, 8(5), 2009.
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