Calendula (marigold) for skin and wounds
Calendula (marigold) in dogs and cats: topical wound healing and skin care, evidence and safety.
Short & honest
Topical calendula is reasonably supported for wound healing and skin inflammation in dogs and cats; internal use lacks evidence in these species — always consult a veterinary surgeon.
Safety assessment: Safe when used correctly
Veterinary review not yet completed
This page is awaiting review by a registered veterinary surgeon. Until then, treat the text as education based on the sources listed — not as a verified veterinary judgement.
What is calendula?
Calendula (Calendula officinalis L.), also known as marigold, is a herbaceous plant from the Asteraceae family. The petals and flowers have been used medicinally for centuries. The main active substances are triterpene esters such as faradiol and arnidiol, and flavonoids such as quercetin and isorhamnetin [3]. These substances inhibit COX-2 and suppress pro-inflammatory cytokines (IL-6, IL-1β, TNF-α), which biochemically explains the anti-inflammatory profile [1][3].
What is it used for?
In dogs and cats, calendula is primarily used topically (on the skin) for:
- Wound healing — after abrasions, small cuts or postoperative skin recovery
- Skin inflammation — in cases of mild dermatitis or irritated skin
- Antiseptic support — as an adjunct in bacterial skin infections
VCA Animal Hospitals recognises topical use in dogs, cats and horses as an anti-inflammatory and antiseptic agent [4].
What does the evidence say?
Wound healing (topical)
The strongest evidence concerns topical application. A Brazilian study from 2012 showed in a rat model that calendula significantly stimulates collagen synthesis, angiogenesis (via increased VEGF expression) and epithelialisation — with measurable effects already on day 4 and 7 after wound application. Antibacterial activity against gram-positive bacteria was also demonstrated [1]. These mechanisms are biologically plausible and consistent with the known pharmacology of the active substances.
Internal use in dogs
An Iranian study (2011, n=10 German Shepherds) investigated calendula enemas in experimentally induced ulcerative colitis. The lesion score decreased from 7–10 to 0 on day 45 (p=0.005) [2]. This is a positive result, but the study is small, it concerns an experimental model, and the findings have not been replicated in larger or clinical trials.
Internal use in cats
For internal use in cats specifically, evidence is almost entirely lacking. Extrapolation from other animal species is possible, but not without risk — always consult a veterinary surgeon.
Evidence gaps
- No randomised controlled trials in companion animals
- Optimal route of administration, concentration and frequency have not been established
- Long-term safety in chronic use has not been investigated
Application in practice
| Route of administration | Animal species | Substantiation |
|---|---|---|
| Topical (cream, oil, gel) | Dog, cat | Reasonable (animal models + clinical practice) |
| Oral/internal | Dog | Limited (one small study) |
| Oral/internal | Cat | Insufficient — not recommended without a veterinary surgeon |
Use only products that are specifically formulated for animals and are free of essential oils, alcohol or other additives that may be toxic to cats. Always have dosage and indication determined by a veterinary surgeon, especially for internal use [4].
When does it not work or when is it unknown?
Calendula is not a replacement for antibiotics in infected wounds or for conventional treatment in severe dermatological conditions. There is no evidence that it is safe or effective internally in cats. In case of doubt about the diagnosis or if recovery does not occur within a few days: always consult a veterinary surgeon.
Why this verdict?
Evidence grade B (reasonable evidence): several animal model studies show demonstrable effects on wound healing and inflammation, including one direct dog study. Limitations are the small sample size, experimental design and lack of randomised controlled trials in companion animals. Internal use in dogs and cats is scarcely researched.
Interactions with medication
- Antihypertensive agents: possibly additive hypotensive effect with oral use
- Sedatives: possibly enhanced sedative effect
- Antifungal agents: caution with concurrent use; interaction not excluded
Legal status (Netherlands)
Calendula is an over-the-counter herbal preparation; not a veterinary medicinal product. For internal use in animals, a veterinary surgeon must establish an indication. In the Netherlands, it does not fall under the Wet diergeneesmiddelen (Veterinary Medicines Act) as a phytotherapeutic preparation, but medical claims are not permitted without registration.
Sources
- [1] Wound Healing and Anti-Inflammatory Effect in Animal Models of Calendula officinalis L. Growing in Brazil. Evidence-based Complementary and Alternative Medicine, 2012. Narrative review doi:10.1155/2012/375671
- [2] The Effect of Calendula Officinalis in Therapy of Acetic Acid Induced Ulcerative Colitis in Dog as an Animal Model. Iranian Red Crescent Medical Journal, 2011. Narrative review source ↗
- [3] An Updated Review on the Multifaceted Therapeutic Potential of Calendula officinalis L.. Pharmaceuticals (Basel), 2023. Narrative review doi:10.3390/ph16040611
- [4] Calendula — VCA Animal Hospitals. VCA Animal Hospitals. Monograph source ↗
Questions about this substance for your animal?
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