Kava kava leaf, derived from the Piper methysticum plant, is a traditional beverage in the Pacific Islands. It is known for its relaxing and stress-relieving properties. Kava kava tea is often consumed for anxiety, insomnia, and muscle pain. However, it is important to note that excessive consumption can lead to side effects like drowsiness and liver problems. It is best to consult with a healthcare professional before consuming kava kava.