"The Vitashower Vitamin C (L-Ascorbic Acid & sodium ascorbate blend) Shower Filter releases the exact amount of Vitamin C to neutralize nearly 100% of all chlorine as the water passes through the shower filter. When the water is shut off, the Vitashower Shower Filter stops releasing the vitamin. This economy of Vitamin C release effectively increases the useful life of the Vitashower Shower Filter. Also, the Vitamin C Shower Filter works in any water temperature, any water pressure and the lifetime of the filter does not depend on the water quality. L-Ascorbic Acid & sodium ascorbate (Vitamin C) also has been shown to significantly reduce or eliminate chloramines from public water sources without the water temperature limitations observed with Activated Charcoal (AC) filtering methods."