Achillea millefolium, commonly known as yarrow, is a perennial herb native to the temperate regions of the Northern Hemisphere, including Europe, Asia, and North America. It thrives in a variety of habitats, including grasslands, meadows, and open forests, most often favoring well-drained soils with ample sunlight. Historically, yarrow has been utilized in traditional medicine for its anti-inflammatory, antimicrobial, and astringent properties. This plant contains several notable chemical constituents, including flavonoids like apigenin and luteolin, as well as some essential oils rich in camphor and chamazulene. It's these chemical compounds that contribute to yarrow's therapeutic applications, which encompass the treatment of gastrointestinal disorders, wound healing, and the reduction of menstrual discomfort. A 2023 review highlighted Achillea millefolium and its potential in managing spasmodic gastrointestinal ulcers, inflammation, and its wound healing role, largely attributing these effects to its antioxidant activity: PMID: 38076118

Historically, according to Greek mythology, the warrior Achilles used yarrow to treat his soldiers' wounds during the Trojan War, underscoring the plant's longstanding association with healing.