Hibiscus tea is categorized as an herbal tea. Herbal tea is made from a variety of plants, herbs, and spices.The part of the hibiscus plant that protects and supports the flower is called the calyx. The dried calyces are used to make hibiscus tea. Packed With Antioxidants.Help Lower Blood Pressure. Help Lower Blood Fat Levels. Boost Liver Health. Promote Weight Loss. Contains Compounds That May Help Prevent Cancer. Could Help Fight Bacteria。