Energy Tonic Healthy Green Tea is developed specially for sub-healthy people. This tea is a healthy tea prepared by modern scientific methods with natural herbs. The combination of herbs increases nitric oxide's production and transport, thus improving blood flow and smooth muscle relaxation. After one-day's work, a cup of this tea will help you relieve fatigue, renew spirit, strengthen the immunity of human body. It is especially suitable for the supplementary treatment of darkening your hair, maintaining and enhancing sexual joys.This tea tastes good, smells fragrant and can be taken long-term without any toxicity and side effects.