Welcome to Root of Happiness. Welcome to The Root of Happiness. Buy the highest quality powdered Kava Root, Kava Concentrates, Tinctures, Kava Extracts, Instant Kava, and more from the most trusted supplier this side of the South Pacific. Kava Kava is a powerful medicinal plant that has been used for over 2500 years as a natural sleep aid and relaxant while supporting relief of minor stress, nervousness, and mild anxiety. We have come to appreciate Kava’s rich tradition in the South Pacific and are pleased to share it with you so Drink Relax and Enjoy!