What is the pH range of hair and skin?

The pH range of hair and skin is typically between 4.5 to 5.5. This slightly acidic environment is essential for maintaining the health and integrity of both hair and skin. The acidity helps to keep the cuticle of the hair closed, which contributes to shine and manageability, while also providing a barrier against environmental damage and bacteria on the skin.

Maintaining this pH range is crucial for various hair and skin care products, as using products with a significantly different pH can disrupt the natural balance, potentially leading to issues such as dryness, irritation, or damage. For example, if a product is too alkaline (higher than pH 7), it may cause the hair cuticle to lift, resulting in frizz and increased susceptibility to breakage. Similarly, an alkaline product on the skin can disrupt the acid mantle, leading to irritations or infections.

Therefore, understanding the pH range helps in choosing appropriate hair and skin care products that support their natural characteristics and promote overall health.