What is the strongest Kava?

Could you please explain to me what exactly is meant by the term "strongest Kava"? Is it referring to the potency of its effects, the purity of its components, or perhaps its overall popularity among Kava enthusiasts? Also, how do we determine which Kava is the strongest? Is there a scientific method or standard measurement used to assess its strength? Moreover, does the strongest Kava necessarily provide the most beneficial effects? Are there any potential risks or side effects associated with consuming stronger varieties of Kava? Finally, could you recommend a specific brand or type of Kava that is considered to be the strongest in the market? Thank you for clarifying these points for me.