Valerian root has been used as a sleep remedy since ancient Greek and Roman times, and modern research generally supports a favourable pattern for reducing time to fall asleep. Below you’ll find our picks, with an honest note on how valerian actually compares to medication, and a small but real chance of next-day grogginess some marketing leaves out.
Traditional Herbs
Valerian Root: What Research Actually Shows
Valerian has a long history as a traditional sleep remedy, and modern research suggests it works by increasing GABA activity in the brain — a genuine, studied mechanism, though it’s worth being precise about what this means: this is a mechanism-level research finding, not a basis for treating valerian as broadly equivalent to prescription anti-anxiety or sedative medication, or assuming it’s free of side effects simply because it’s herbal.
Reviews of valerian research generally report a favourable pattern for reducing the time it takes to fall asleep and improving overall sleep quality, though study quality varies considerably across the evidence base, and results aren’t uniform across every trial. As covered in more detail in our sleep supplements guide, it’s worth being accurate about grogginess specifically: while valerian is generally associated with less next-day grogginess than some pharmaceutical sleep aids, mild grogginess is still possible for some people, so “without morning grogginess” isn’t a guarantee for everyone.
A commonly referenced dose is 300-600mg of extract, taken 30-60 minutes before bed. Effects, where they occur, may be noticeable within the first few uses for some people, though consistent use over several weeks is generally more reliable than a single dose.
Valerian is generally well tolerated, though mild side effects can include headache, dizziness, or digestive upset. It can enhance the sedating effect of alcohol and other sedative medications, so it’s worth avoiding combining these, and speaking to your GP before regular use if you take sedatives, sleep medication, or other medication affecting the central nervous system. Valerian isn’t recommended during pregnancy or breastfeeding given limited safety data, and it’s generally sensible to avoid driving or operating machinery until you know how it affects you individually.