Rootwork

Hops

Humulus lupulus

CannabaceaeEurope, western Asia, and North America; widespread in temperate Northern Hemisphere; cultivated globally for brewing

Description

overall appearance

A vigorous perennial climbing bine (twines clockwise on its own stem rather than via tendrils) reaching 6–10 m in a single season. Female plants produce the commercially significant papery cone-like strobiles. Dies back to the rootstock each winter and regenerates each spring.

roots

Deep, spreading rhizomatous root system that can spread 1–2 m laterally; roots are fleshy, pale brown; primary commercial propagation is from root cuttings

stem

Tough, rough-textured bine with downward-pointing hooked hairs (bristles); clockwise twining; 4–6 m in one season to 10 m under ideal conditions; dies back to crown each fall

leaves

Opposite, petiolate, palmately 3–5 lobed, 7–14 cm wide; lobes ovate with acuminate tips and coarsely serrate margins; rough, scratchy texture due to stiff hairs on both surfaces; deep green

flowers

Dioecious; female flowers are inconspicuous, developing into cone-like strobiles (hops) 2.5–5 cm long; male flowers in loose panicles; blooms July–August

fruits/seeds

Strobiles (seed cones): papery, overlapping bracts (bracteoles) enclosing tiny achenes; at base of bracteoles are yellow lupulin glands containing the resinous bitter acids and essential oils

Active Compounds

Alpha acids (humulone, cohumulone, adhumulone; ~2–20% of strobiles)Beta acids (lupulone, colupulone, adlupulone)2-Methyl-3-buten-2-ol (sedative degradation product of isovaleric acid)8-Prenylnaringenin (potent phytoestrogen)Xanthohumol (prenylated chalcone, anti-cancer activity)Myrcene, linalool, beta-caryophyllene (essential oils)Tannins and polyphenolsLupulone and isoxanthohumol

Traditional Uses

  • European monastic brewing tradition used hops since 9th century CE to preserve beer and add bitterness; previously gruit herb blends were used
  • German folk medicine used hops in sleep pillows for insomnia since the Middle Ages; pickers noted somnolence from contact with lupulin
  • English herbalists including Nicholas Culpeper (1653) recommended hops for insomnia, nervous tension, and digestive complaints
  • Traditional use in European folk medicine for anxiety, irritability, and restlessness, often combined with valerian
  • Used as a bitter digestive tonic in German and Swiss traditional medicine to stimulate appetite and gastric secretions
  • Hops tea used for menstrual pain and as an emmenagogue in traditional European gynecology
  • Topical use of hops poultices for neuralgia, rheumatic pain, and skin ulcers in folk medicine
  • Native American groups (Iroquois, Cherokee) used related species Humulus americanus for pain and sleep

Modern Applications

  • Sleep disorders: 2-methyl-3-buten-2-ol and other compounds show sedative effects; RCTs combining hops with valerian show significant improvement in sleep quality vs. placebo
  • Anxiety reduction: GABA-A receptor modulation by hops compounds demonstrated in animal studies and supported by clinical trials
  • Menopausal symptoms: 8-prenylnaringenin (8-PN) is the most potent plant phytoestrogen known; reduces hot flashes and insomnia in small RCTs
  • Anti-cancer: xanthohumol inhibits multiple cancer cell lines and has anti-angiogenic properties in vitro and in animal models
  • Antimicrobial: humulone and lupulone are potent against gram-positive bacteria (Staphylococcus, Clostridium) and Mycobacterium tuberculosis in vitro
  • Anti-inflammatory: iso-alpha acids inhibit NF-ΞΊB and reduce COX-2 expression in macrophages
  • Analgesic: alpha acids show opioid receptor-independent pain modulation in animal studies
  • Metabolic: xanthohumol improves insulin sensitivity and lipid profiles in obese animal models

⚠️ Safety Information

Contraindications

  • Pregnancy: phytoestrogenic and emmenagogue properties; avoid therapeutic doses
  • Estrogen-sensitive conditions (ER+ breast cancer, uterine fibroids, endometriosis): 8-prenylnaringenin is strongly estrogenic
  • Depression: sedative bitters may worsen depressive states; use with caution in major depression
  • Pediatric use: avoid without professional supervision
  • Pre-surgical anesthesia: CNS depressant effects are additive; discontinue 2 weeks prior to surgery

Side Effects

  • Sedation and daytime drowsiness, especially when combined with alcohol or sedative medications
  • Allergic contact dermatitis in hop pickers: 'hop picker's disease' from lupulin gland contact
  • Mild GI upset (nausea, bitter taste) with high doses
  • Hormonal effects in women: menstrual changes with chronic use of phytoestrogenic doses
  • Exacerbation of depressive symptoms with long-term regular use
  • Rare anaphylaxis in those with hop allergy

Drug Interactions

  • CNS depressants (benzodiazepines, barbiturates, opioids, alcohol): significant additive sedation; risk of respiratory depression
  • Antidepressants (SSRIs, MAOIs): potential interactions via serotonergic and MAO inhibitory activity of hops compounds
  • Hormonal therapies (estrogen, tamoxifen, aromatase inhibitors): 8-prenylnaringenin may antagonize or augment estrogenic effects
  • Sedative antihistamines (diphenhydramine, hydroxyzine): additive sedation
  • CYP3A4 substrates: hops extract may inhibit CYP3A4 metabolism of multiple drugs

Parts Used

  • Female strobiles (cones, primary)
  • Lupulin glands (yellow resinous powder from strobiles)
  • Whole dried strobiles
  • Tincture and standardized extract

Preparation Methods

Dried strobile tea: 0.5–2 g in 250 ml boiling water, steep 10–15 minutes; 1–2 cups before bed for sleep

Standardized extract capsules: 60–500 mg/day (standardized to 0.5% 2-methyl-3-buten-2-ol equivalents)

Valerian-hops combination: most studied preparation; 160 mg hops + 480 mg valerian root extract per dose

Tincture (1:5 in 60% ethanol): 1–2 ml in 30 ml water, twice daily or before bed

Sleep pillow: 25–30 g dried hops stuffed in a small pillow; aromatherapeutic sedative via inhalation

Liquid extract (1:1): 0.5–2 ml before bedtime

Related Plants

Hemp / CBD

Cannabis sativa

Cannabaceae
Ancient Chinese medicine (Shennong Bencao Jing): seeds used as tonic food and to treat constipation and wasting diseasesAyurvedic tradition: 'Vijaya' used to stimulate appetite, relieve pain, and as a sleep aidEuropean folk medicine: poultices of seeds and leaves applied for skin inflammation and joint pain

Horsetail

Equisetum arvense

Equisetaceae
Indigenous North American use (Cherokee, Iroquois): diuretic tea for kidney and bladder conditions and as a remedy for urinary infectionsNative American topical use: scraped stems applied to fresh wounds to stop bleedingTraditional European use (Dioscorides, Roman medicine): wounds, fractures, and bleeding; 'stanching blood' is among the oldest recorded uses

Linden / Tilia

Tilia cordata

Malvaceae
European folk medicine used linden flower tea for colds, flu, and fever since at least the Middle Ages; referenced in Hildegard von Bingen's writings (12th c.)French tisane de tilleul remains a bedtime relaxant and sleep aid in widespread popular useGerman Commission E-approved for use in cold and cough remedies

Parsley

Petroselinum crispum

Apiaceae
Ancient Greek and Roman use: parsley was sacred to the dead, used in funeral rites; Hippocrates prescribed for kidney stones and as a diureticMedieval European monks used parsley for urinary tract complaints, kidney stones, and menstrual irregularitiesAyurvedic tradition uses parsley for urinary disorders, jaundice, and as a digestive carminative

Spearmint

Mentha spicata

Lamiaceae
Ancient Greek and Roman use: spearmint strewn on floors, used to flavor food, and prescribed by Hippocrates and Dioscorides for nausea and digestive complaintsMedieval European monks cultivated spearmint in physic gardens for digestive disorders, flatulence, and indigestionAyurvedic tradition uses spearmint (pudina) to treat digestive disorders, nausea, hiccups, and as a cooling agent for pitta

Alfalfa

Medicago sativa

Fabaceae
Traditional Chinese medicine: 'Mu Xu' used as a diuretic and for kidney stones, urinary infections, and edemaAyurvedic tradition: used as a nutritive tonic, diuretic, and to treat arthritis and digestive weaknessArab herbalism: first described as 'al-fisfisa' for horses but also used by humans for fatigue and vitamin deficiency
Disclaimer: For educational purposes only. This is not medical advice. Always consult a qualified healthcare provider.