Blue tea is a caffeine-free herbal beverage made using the flower or petals of Clitoria ternatea. It is a good alternative to caffeinated beverages such as coffee. Blue tea is native to Southeast Asia, although it is now becoming a common beverage outside the region. Butterfly-pea tea has a distinct deep blue color. However, this color might change depending on the pH of the tea. For instance, adding lemon juice to improve flavor causes blue tea to gain a dark purple tinge.

Historically, butterfly-pea flowers have been used to brew tea for centuries across Southeast Asian countries. Their medicinal value is evident in their use in Ayurveda. Although Clitoria ternatea was originally grown in tropical Asia, it is now an exotic plant species in Australia, Africa, Central and South America, and the Caribbean. Today, it is relatively easy to obtain butterfly-pea flowers, which…