How to intensify kava?

Excuse me, I'm curious about intensifying kava. Could you elaborate on what methods or techniques are commonly used to achieve this? Is it through a specific brewing process, the use of certain additives, or perhaps a combination of both? Also, are there any precautions one should take when attempting to intensify kava, such as avoiding potential negative side effects or ensuring the end product remains SAFE for consumption? I'd appreciate any insights or advice you have on the matter.