Nature's Sunshine Kava Calm contains Kava root and Passionflower extracts. Kava (Piper methysticum) is native to the Islands of the South Pacific and drinking kava as a water infused beverage has been an integral part of Pacific Island cultures for many centuries. It is consumed on social occasions to promote relaxation and socialising, reduce anxiety and afterwards encourage restful sleep. Kava has been the focus of much research, and studies report that Kava affects neurotransmitters in the brain, specifically those that influence mood and sleep. The kavalactones are the main active constituents in Kava, considered to be responsible for the herb's therapeutic effects. Clinical results indicate that 60-120mg of kavalactones daily may help alleviate mild anxiety and nervous tension. Kava Calm contains a 100% aqueous extract of kava root sourced from Vanuatu and provides the full spectrum of kava constituents including a standardised dose of the active kavalactones. Also contains passionflower. Most of us have enjoyed the sweet fruit from a passionfruit vine, however it is the leaves and flowering tops of the Passiflora Incarnata variety that are used for medicinal purposes. Passionflower is valued in Western Herbal Medicine for its calming properties and is used to help relieve nervous tension and anxiety. It is also regarded as having a gentle sedative effect, beneficial to help relieve restlessness and assist those who are troubled by poor sleep.