It is widely known that Vitamin C is a powerful anti-oxidant inside the human body. What is not well-known is that Vitamin C also acts as a neutralizing agent when it comes into contact with chlorine and chloramine. The Vitashower Vitamin C Shower Filter utilizes ascorbic acid chemistry for de-chlorination. Vitamin C does not hold the chlorine, rather it neutralizes chlorine from an toxic substance into a harmless compound. In more simple terms, Vitamin-C changes chlorine and chloramine from something that can cause you harm to something that causes NO HARM. more info