Valerenic acid is a component of the essential oil of valerian. According to "Encyclopedia of Natural Medicine," as a health supplement, valerenic acid has both sedative and anti-anxiety properties. These effects result from valerians ability to increase the power of a substance called gamma-aminobutyric acid. GABA is a neurotransmitter involved in anxiety regulation. Valerenic acid effects a specific type of GABA receptor. You should speak with your doctor before using any valerenic acid supplement.