Vitamin C must be consumed in the form of food or supplement; our bodies do not create Vitamin C. Vitamin C serves as an effective free radical scavenger to protect cells from damage. Researchers found naturally occurring compounds in green tea, known as catechins, have an anti-oxidant effect. Green tea has a protective effect against toxins such as heavy metals, synthetic chemicals and harmful micro-organisms. Regular consumption of System Builder with Vitamin C supports good health. It can be consumed as often as you like.