Calendula for Wound Healing

Research suggests that Calendula officinalis shows promising wound-healing properties across a range of study types, including animal studies, in vitro experiments, preclinical hydrogel and nanofiber formulations, and a modest number of clinical trials, with the overall direction of evidence leaning supportive but not yet conclusive. Studies indicate that calendula's active constituents — particularly triterpenoids, flavonoids, and carotenoids — may contribute to wound healing through anti-inflammatory, antioxidant, and antimicrobial mechanisms, with preclinical work showing accelerated wound closure, increased collagen deposition, and reduced inflammatory markers, and a small randomized controlled trial reporting improved healing of cesarean wounds and another suggesting benefit for second-degree burns when calendula was taken orally as a supplement. However, two systematic reviews — one from 2008 and one from 2019 — introduce important caution, noting that clinical trial results have been mixed, that much of the available evidence comes from small or methodologically limited studies, and that calendula did not show clear benefit in all wound types examined, such as diabetic leg ulcers. The broader body of evidence is encouraging enough to support continued investigation, but researchers across multiple reviews consistently call for larger, well-designed clinical trials before firm conclusions about calendula's role in wound care can be drawn.