KavaKaka, or Kava, (Piper methysticum) (Piper Latin for "pepper", methysticum Greek for "intoxicating") is an ancient crop of the South Pacific. The word kava is used to refer both to the plant and the beverage produced from its roots. Kava has been used by indigenous people as an intoxicating traditional beverage since ancient times. Various preparations of kava have been marketed since the 1980s, especially in Europe and North America to manage mild anxiety, tension, and restlessness. Some reports also indicate that kava preparations may have analgesic, spasmolytic, neuroprotective, and antimitotic activities.

Its active ingredients are called kavalactones. To date, 18 kavalactones have been identified, among these, six major kavalactones constitute approximately 95% of the lipid extract derived from the dried roots and rhizomes; these are kavain, dihydrokavain, methysticin, dihydromethysticin, yangonin, and desmethoxyyangonin.

1. It has the function of enhanced immune. improve cardiovascular system and anti-tumor;
2. It could resist tiredness, reduce blood fat, resist radiation and ulceration, protect liver, enhance immunity etc;
3. It has the function of relieving a cough, eliminating sputum, relieving dyspepsia and promote blood circulation by removing blood stasis;
4. It could be used for cough with copious whitish viscid sputum, indigestion, abdominal pain and ecchymosis, injury due to falling;
5. It could be used for improving the cardiac muscle microcirculation, reducing the cardiac muscle oxygen consumption capacity and diminishing inflammation and so on.