Cow parsley (Anthriscus sylvestris) is a perennial herbaceous plant in the Apiaceae (carrot) family that grows widely across Europe and the UK, commonly found along hedgerows, grasslands, and roadside verges. The plant contains several phytochemicals including flavonoids, phenolic acids, and volatile oils, which are known for their antioxidant and mild anti-inflammatory properties. In traditional herbal practices, the leaves and roots were sometimes used as a mild diuretic, to support digestion, and occasionally applied topically to soothe minor skin irritation. These effects are thought to relate to the plant’s bioactive compounds that may help reduce oxidative stress and support metabolic functions.

However, cow parsley is not widely used in modern clinical medicine, and there is limited scientific evidence from human studies confirming significant health benefits. A major safety issue is that it closely resembles several highly toxic plants within the same family, such as poison hemlock (Conium maculatum) and hemlock water dropwort (Oenanthe crocata), which contain powerful neurotoxins including coniine and oenanthotoxin. Because misidentification can lead to serious poisoning, experts strongly advise against consuming wild plants that resemble cow parsley unless identification is completely certain.