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Valerian
Valerian (Valeriana officinalis) is one of the most well-established herbal sedatives, used since ancient Greek and Roman times for insomnia and nervous restlessness. It increases GABA availability in the brain to promote deep, restorative sleep and reduce anxiety.
Benefits
What is Valerian?
Valerian (Valeriana officinalis) is a perennial flowering plant native to Europe and Asia, with a medicinal history spanning over 2,000 years. Hippocrates described its properties, and Galen later prescribed it as a remedy for insomnia. The name "Valerian" derives from the Latin valere, meaning "to be strong" or "to be well."
Today, Valerian is one of the most widely used herbal sleep aids in Europe and North America, and is approved by the European Medicines Agency (EMA) and the German Commission E for the treatment of sleep disturbances and mild anxiety. It is a first-line herbal recommendation for insomnia in many European healthcare systems.
The root contains a complex mixture of active compounds including valerenic acid, isovaleric acid, iridoids (valepotriates), flavonoids, and lignans. Valerenic acid is considered the primary active constituent, though the full therapeutic effect is believed to arise from the synergy of multiple compounds - a concept known as the "entourage effect" in herbal medicine.
- GABA enhancement: Valerenic acid inhibits the enzyme responsible for GABA degradation (GABA transaminase) and may also stimulate GABA release and inhibit GABA reuptake, increasing overall GABA availability at the synapse.
- GABA-A receptor modulation: Valerenic acid has been shown to bind to the beta-3 subunit of the GABA-A receptor, producing anxiolytic and sedative effects distinct from those of benzodiazepines.
- Adenosine receptor agonism: Some compounds in Valerian may interact with adenosine A1 receptors, which promote sleep onset and maintain sleep depth.
- Serotonin receptor interaction: Valerian extracts have shown affinity for 5-HT5a serotonin receptors, which are involved in circadian rhythm regulation and sleep architecture.
- Glutamate reduction: By enhancing GABAergic inhibition, Valerian indirectly reduces excitatory glutamate signalling, promoting neural calm.
- Standardised extract: 300–600 mg per day, standardised to 0.8–1% valerenic acid
- For sleep: 400–600 mg taken 30–120 minutes before bed. Some studies suggest taking it 1–2 hours before bed for optimal effect.
- For anxiety: 200–400 mg, 2–3 times daily
- Tea: 2–3 g of dried root steeped in hot water for 10–15 minutes; 1–2 cups in the evening
- Onset: While some individuals notice effects on the first night, Valerian often requires 2–4 weeks of consistent use for full benefits to develop
- Combined with hops: The combination of Valerian + Hops is particularly well-studied for sleep improvement
Valerian works best when taken consistently rather than on an as-needed basis. Allow 2–4 weeks for optimal effects.
- Side effects: Generally well-tolerated. Occasional reports of headache, dizziness, GI upset, and vivid dreams. Paradoxical stimulation (restlessness, anxiety) occurs rarely.
- Morning grogginess: High doses may cause a mild "hangover" effect the next morning. If this occurs, reduce the dose.
- Drug interactions: May enhance the effects of sedatives, benzodiazepines, barbiturates, and alcohol. May interact with anaesthetics - discontinue 2 weeks before surgery.
- Liver: Rare reports of hepatotoxicity, though most cases involved combination products. Pure Valerian root appears safe for the liver at recommended doses.
- Pregnancy: Insufficient safety data - avoid during pregnancy and breastfeeding.
- Withdrawal: After extended use, taper gradually rather than stopping abruptly to avoid possible withdrawal symptoms.
Natural Sources & Forms
- Valerian root: The root and rhizome are the medicinally active parts; dried and used in teas, tinctures, and extracts
- Standardised extracts: Look for products standardised to valerenic acid content (0.8–1%)
- Tea: Widely available as single-herb or combination sleep teas (often with chamomile, passionflower, or hops)
- Tinctures: Liquid extracts available from herbal supplement suppliers
- Supplements: Available as capsules, tablets, and softgels. The strong, distinctive odour (due to isovaleric acid) is normal and indicates quality.
Research Studies
Valerian root in treating sleep problems and associated disorders - a systematic review and meta-analysis
Shinjyo N, Waddell G, Green J - Journal of Evidence-Based Integrative Medicine
Valerian consistently improved sleep quality across 60 studies, with enhanced effects when combined with hops or lemon balm.
Valerian for sleep: a systematic review and meta-analysis
Bent S, Padula A, Moore D, Patterson M, Mehling W - American Journal of Medicine
Valerian root improves subjective sleep quality and helps people feel more rested without next-day impairment.
Frequently Asked Questions
Valerian (Valeriana officinalis) is one of the most well-established herbal sedatives, used since ancient Greek and Roman times for insomnia and nervous restlessness. It increases GABA availability in the brain to promote deep, restorative sleep and reduce anxiety.
The key benefits of Valerian include: Anxiety & Calm, Energy, Focus, Mood, Sleep, Stress Relief.
GABA enhancement: Valerenic acid inhibits the enzyme responsible for GABA degradation (GABA transaminase) and may also stimulate GABA release and inhibit GABA reuptake, increasing overall GABA availability at the synapse. GABA-A receptor modulation: Valerenic acid has been shown to bind to the beta-3 subunit of the GABA-A receptor, producing anxiolytic and sedative effects distinct from those of benzodiazepines. Adenosine receptor agonism: Some compounds in Valerian may interact with adenosine A1 receptors, which promote sleep onset and maintain sleep depth. Serotonin receptor interaction: Valerian extracts have shown affinity for 5-HT5a serotonin receptors, which are involved in circadian rhythm regulation and sleep architecture. Glutamate reduction: By enhancing GABAergic inhibition, Valerian indirectly reduces excitatory glutamate signalling, promoting neural calm.
Standardised extract: 300–600 mg per day, standardised to 0.8–1% valerenic acid For sleep: 400–600 mg taken 30–120 minutes before bed. Some studies suggest taking it 1–2 hours before bed for optimal effect. For anxiety: 200–400 mg, 2–3 times daily Tea: 2–3 g of dried root steeped in hot water for 10–15 minutes; 1–2 cups in the evening Onset: While some individuals notice effects on the first night, Valerian often requires 2–4 weeks of consistent use for full benefits to develop Combined with hops: The combination of Valerian + Hops is particularly well-studied for sleep improvement Valerian works best when taken consistently rather than on an as-needed basis. Allow 2–4 weeks for optimal effects.
Side effects: Generally well-tolerated. Occasional reports of headache, dizziness, GI upset, and vivid dreams. Paradoxical stimulation (restlessness, anxiety) occurs rarely. Morning grogginess: High doses may cause a mild "hangover" effect the next morning. If this occurs, reduce the dose. Drug interactions: May enhance the effects of sedatives, benzodiazepines, barbiturates, and alcohol. May interact with anaesthetics - discontinue 2 weeks before surgery. Liver: Rare reports of hepatotoxicity, though most cases involved combination products. Pure Valerian root appears safe for the liver at recommended doses. Pregnancy: Insufficient safety data - avoid during pregnancy and breastfeeding. Withdrawal: After extended use, taper gradually rather than stopping abruptly to avoid possible withdrawal symptoms.
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