Hops extract is obtained primarily from hop cones, sometimes from the lupulin glands on their surface. The extract abounds in essential oil ingredients: terpene and sesquiterpene compounds, such as humulene, myrcene, farnesene and caryophyllene. They are accompanied by bitter resins: alpha acids (lupulones), beta acids (humulones) and their derivatives (including methylbutenol) and many phenolic acids, tannins, flavonoids and chalcones. However, one of the most essential substances in hops extract is xanthohumol. It is a strong antioxidant and one of the compounds that determine beer flavour.
