How does the health of my hair before bleaching affect my results?

If your hair is dry from swimming, heat styling, etc, bleaching will dry it out further, and may not be the best course of action until you spend some time repairing the health of your hair. This gives you the best chance of going through the lightening process with minimal damage. If you bleach already over-processed or dry/brittle hair, you will experience inevitable breakage. The healthier your hair before bleaching, the healthier it will be after bleaching too! So make sure to treat your hair well prior to bleaching, keeping it conditioned and moisturized, using sulfate-free, silicone-free products and minimizing heat styling to avoid other types of damage.