Fennel seeds are the dried seeds of the Foeniculum vulgare plant. Fennel seeds are small, oval-shaped seeds with ridges. They have a pale green to yellowish-brown color.

Fennel seeds are commonly used as a spice in various cuisines around the world.

Fennel seeds contain antioxidants such as flavonoids and phenolic compounds, which may help protect against oxidative stress and inflammation. Fennel seeds are a good source of fiber, calcium, magnesium, potassium, and vitamin C.