Yarrow for Anti-Inflammatory

Research suggests that yarrow (Achillea millefolium) possesses meaningful anti-inflammatory activity, with studies identifying several mechanisms through which its compounds — particularly flavonoids like apigenin, luteolin, and casticin, as well as volatile terpenes — appear to inhibit inflammatory enzymes, suppress pro-inflammatory signaling molecules such as prostaglandin E2, IL-1β, IL-6, and IL-8, and activate antioxidant defense pathways. The available evidence comes primarily from laboratory cell studies, animal experiments, and narrative reviews rather than human clinical trials, which represents a significant limitation in translating these findings to real-world use. Studies indicate that yarrow's anti-inflammatory constituents survive digestion at least partially and that different chemical fractions of the plant may act through complementary mechanisms, though researchers note that inconsistent plant classification and varied methods across studies make direct comparisons difficult. One 2023 pharmacological review also flagged a clinically relevant caution: yarrow can interfere with cytochrome P450 liver enzymes, potentially raising blood levels of certain conventional medications, which suggests that individuals using prescription drugs should be aware of possible interactions.