Is it rude to refuse kava?

Could you please elaborate on whether declining an offer of kava is considered impolite? I'm curious to understand the cultural significance and etiquette surrounding this traditional Polynesian beverage. Is there a particular reason why refusing kava might be viewed as disrespectful, or is it simply a matter of personal preference? Could there be circumstances where refusing might be acceptable, or is it generally advisable to accept the offer as a sign of respect? Thank you for clarifying this cultural aspect for me.