Comparison of antioxidant activity of extracts of hop leaves harvested in different years

Abstract

Introduction: Hop (Humulus lupulus L.) is a common plant in Europe, with many beneficial health effects. In addition to the use in brewing, hops are a valuable source of active substances used in conventional and folk medicine, such as humulones and lupulones, as well as antioxidants, including phenolic compounds.

Keywords

• humulus lupulus l.
• dpph
• folin-ciocalteu method
• frap
• antioxidants
• ultrasound-assisted extraction