Blue tea is an herbal infusion made from butterfly pea flowers, which can be rich in anthocyanins. Anthocyanins give the tea its vivid blue colour and medicinal Houses. Lowers hypertension: Consumption of butterfly pea flower tea can help reduce blood pressure. Persons with elevated hypertension (hypertension) could consume this. https://www.goteaworld.com/butterfly-pea-flower-tea-side-effects/