Root herb with distinctive strong, earthy smell (considered unpleasant by many). Contains valerenic acid, isovaleric acid, and GABA — which bind to GABA receptors and inhibit GABA breakdown. The strong smell is from valerenic acid oxidation and is a reliable sign of active root. Capsules are more practical than tea for most users.
Valerian capsules at every pharmacy, health store, and Walmart health section. Very affordable.
The sleep evidence is consistent across multiple meta-analyses. A 2006 meta-analysis in the American Journal of Medicine reviewed 16 RCTs and found valerian significantly improved sleep quality without producing side effects. The mechanism: valerenic acid inhibits GABA-T (same as lemon balm) and directly binds to GABA-A receptors (same as passionflower's chrysin). The combined lemon balm + valerian formulation has the most clinical evidence — a 2006 RCT found this combination reduced restless sleep by 80%, difficulty falling asleep by 70%, and daytime fatigue by 65%. For restless leg syndrome — which disrupts sleep and is common in people with iron deficiency anemia (disproportionate in Black women) — valerian specifically reduced RLS symptoms in a 2009 RCT. The effects build over 2-4 weeks of consistent use — not immediate like pharmaceutical sleep aids.
Capsule: 400-900mg valeric acid standardized extract 30-60 minutes before bed. Tea: very strong smell — most find capsules more practical. Tincture: 30-60 drops in water. Combine with lemon balm for maximum evidence-based effect.
Free, no account needed to ask.