By skyforbes 
While kava can be very useful in relieving anxiety and stress, it is important to remember that the period of use should be on a case to cases basis and under the supervision of a certified healthcare professional. Generally, the duration of taking kava will depend on the reason for using kava, your health status, and prescribed dosage. The use of kava for more than three months is usually not recommended by health professionals unless prescribed to avoid the risk of long term side effects.
Long term and heavy use of kava can lead to the possibility that you may develop some side effects. One of the most common side effects of long term, heavy kava consumption is rough and dry skin. Your skin can get dried out, scaly and slightly yellowish. This is a condition known as kava dermopathy, and usually subsides back to normal after the person stops drinking kava.
There is also the possibility of liver damage for heavy use of kava that has been circling around for years, but the evidence to support this hypothesis has been widely debated.
There are some long term kava users that have been using kava for years now without stopping and did not encounter any issues at all. One kava enthusiast revealed online that he has been taking kava every day for 25 years and has never had any problems.
We usually recommend to cycle in and out kava routines throughout the year, since we believe everything in life should be done in moderation. But as long as you’re using high quality noble kava, to each their own.
Again, kava does not work equally for everyone. What works for some may not work for you.