Humulus Species: A Traditional Medicinal Plant and Its Modern Pharmacological Importance

The genus Humulus, particularly Humulus lupulus (hops), has been widely recognized for its historical and traditional uses in various cultures due to its diverse biological activities. This review compiles the general characteristics, traditional uses, essential oil compositions, and pharmacological properties of Humulus species, with a focus on their antioxidant, antimicrobial, anti-inflammatory, anticancer, antiviral, and insecticidal activities. The essential oils of Humulus species, rich in bioactive compounds such as β-caryophyllene, α-humulene, and β-myrcene, contribute to their broad-spectrum therapeutic effects. These compounds have demonstrated significant potential in reducing oxidative stress, combating microbial infections, alleviating inflammation, and exhibiting cytotoxic effects against cancer cells. Additionally, the traditional uses of Humulus species for sleep regulation, digestive health, and hormone balance are supported by modern pharmacological studies. The antioxidant and antimicrobial properties of Humulus species highlight their potential as natural sources of antioxidants and alternatives to synthetic antibiotics, particularly in the face of rising antibiotic resistance. Furthermore, the insecticidal and allelopathic effects of these plants suggest their applicability in sustainable agriculture as eco-friendly biopesticides and weed control agents. Despite the promising findings, gaps remain in understanding the pharmacokinetics, bioavailability, and safe dosage ranges of the bioactive compounds in Humulus species. Future research should focus on in vivo and clinical studies to validate these effects, explore their potential in functional foods and nutraceuticals, and assess their ecological and environmental impacts for large-scale cultivation. In conclusion, Humulus species represent a versatile and valuable natural resource with significant potential in medicine, agriculture, and industry. Continued research efforts are essential to fully unlock their benefits and integrate them into modern therapeutic and industrial applications.