2. Acidity

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The pH level of your scalp is slightly higher than the rest of your hair, and tends to be around 5. If you use a shampoo with a different pH, it can cause hair follicles to become brittle and snap, which makes your hair look unhealthy and thin. Try to find a brand that states its pH, and try a few different ones to see which one suits you best and leaves yourhair shiny. You can usually get samples from the companies or salons!