Hops are the cone-shaped flowers, called strobiles, of the climbing plant Humulus lupulus. They are best known as the ingredient that gives beer its bitterness and aroma, and they have been grown in England for centuries, especially in Kent, Herefordshire and Worcestershire.
Long before modern brewing, people noticed that hop pickers seemed to tire easily, and hops became part of European herbal tradition, where they are traditionally used to support relaxation and sleep. Hop pillows, stuffed with dried cones, were a folk remedy for restless nights. The European Medicines Agency has a monograph recognising the traditional use of hop strobiles for mild symptoms of stress and to aid sleep.
On supplement labels you will see hops, hop strobile extract or Humulus lupulus flower extract, often with an extract ratio. Hops are very often paired with valerian, lemon balm or passionflower. As a food supplement ingredient, hops have no authorised health claim.