Your addiction: Water sports and swimming pools.

The damage: "Chlorinated water damages the hair cuticle," explains Brad Ngata of Brad Ngata Hair Direction. "It dries out the natural sebum, leaving dull and dry strands." According to Alison Roughley, senior scientist at Procter & Gamble, chlorine also exposes hair to mineral deposits, which may cause the colour to change slightly. "This is especially apparent in bleached blondes, as the coloured deposits are more visible in lighter tones."

Your solution: "Rinse hair thoroughly with cold water immediately after swimming," advises Ngata. Blondes need to take it one step further to beat brassy tones. "Shampoos designed for blondes have been shown to reduce the impact of mineral deposits," states Roughley. "Regular use will help reduce the impact of chlorine, while at the same time maintain moisture content in the hair."

You need:Above, from left: Herbal Essences Hello Hydration Moisturizing Shampoo, $5.99;Joico Moisture Recovery Conditioner, $22.95; Pantene Pro-V Blonde Expressions Daily Colour Enhancing Shampoo, $8.99; Trilogy Botanical Moisture Masque for Dry Hair, $24.95.