Vitamin C water filtration material lost its popularity years ago since it was not as effective when compared to other filtration material such as KDF and activated carbon. However, it made a comeback in form of shower filter. Vitamin C shower filters are everywhere now they come in a colorful variety and claim to remove chlorine and chloramine, add a nice aroma to your shower and they claim to vitalize your hair and skin with vitamin C. When you look beyond the hype, there is not much evidence to back these claims.