Yarrow for Wound Healing

Research suggests that yarrow (Achillea millefolium and related species) has meaningful potential as a wound-healing agent, supported by a fairly consistent body of evidence including multiple reviews, animal studies, in vitro experiments, and a small number of human trials. Studies indicate that yarrow's bioactive compounds — including flavonoids, terpenes, and phenolic acids — may contribute to wound healing through several overlapping mechanisms, such as reducing inflammation, inhibiting bacterial biofilm formation in wound-relevant pathogens like Staphylococcus aureus and Pseudomonas aeruginosa, and supporting tissue repair processes like fibroblast activity. A randomized controlled trial found that topically applied yarrow oil extracts restored skin barrier measurements after induced irritation, while animal and cell-based studies have explored yarrow-enriched hydrogels and wound dressings with encouraging results, and one multi-herb RCT in women with vaginitis reported positive outcomes from a formulation that included yarrow alongside other botanicals. However, the overall evidence base relies heavily on laboratory and animal research, clinical trials in humans remain limited, and a 2023 pharmacological review flagged that yarrow can interact with cytochrome P450 liver enzymes in ways that may elevate blood levels of certain medications, which means its therapeutic potential — while promising — still requires more rigorous, standardized human investigation before firm conclusions can be drawn.