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What is the pH range of a balanced shampoo?

  1. 3.0 - 4.0

  2. 4.5 - 5.5

  3. 6.0 - 7.0

  4. 7.0 - 8.0

The correct answer is: 4.5 - 5.5

A balanced shampoo typically has a pH range of 4.5 to 5.5, which is slightly acidic. This pH range is optimal for maintaining the structure and health of both the hair and the scalp. The hair's cuticle, which is the outer layer, is made of overlapping scales that can be affected by pH levels. When the pH is within this balanced range, the cuticle lies flat, helping to give the hair a smooth, shiny appearance and reducing frizz. Using a shampoo with a pH that is too far from this range can lead to several issues. A shampoo that is too acidic can strip natural oils and potentially harm hair texture, while one that is too alkaline can cause the cuticle to lift, resulting in increased porosity, frizz, and damage. Thus, the pH of 4.5 to 5.5 is specifically designed to help preserve the hair's integrity and enhance the overall health and color of the hair, making it the ideal choice for most hair types.