Well you see the Valerian root has been used as a sleep aid for over 1,000 years. Its ability to help relax the central nervous system, promote feelings of calm, decrease levels of anxiety and stress, and enhance sleep are known to millions the world over.
Unlike some prescription sleep aids, valerian is not known to cause morning grogginess and is non-addictive.
The Valerian root has an affinity for GABAA (responsible for mediating the effects of gamma-aminobutyric acid (GABA)) receptors, likely due to the relatively high GABA content in valerian itself. The amount of GABA (the chief inhibitory neurotransmitter in the human central nervous system.) present in valerian extract is sufficient to induce release of GABA in synaptosomes and may also inhibit GABA reuptake.
Other believed mechanisms of action in valerian include inhibition of the catabolism of GABA by valerenolic acid and acetylvalerenolic acid and affinity for the 5-HTA receptor by another constituent of valerian, called hydroxypinoresinal.
Due to the herbâ€™s historical use as an anti-convulsant, sedative, migraine treatment and pain reliever, most basic research has been focused on the interaction of Valerian constituents with the GABA neurotransmitter. The findings of these studies remain inconclusive. Thus, the true mechanism of action of Valerian remains unknown.
Also you should know that the American Herbal Products Association (AHPA) gives Valerian a class 1 safety rating, indicating that it is a safe herb with a wide dosage range, but there is also evidence that in some cases of long-term use, serious withdrawal symptoms may occur when it is stopped abruptly.so don't consume too much.