What is the ideal pH range for skin?

The ideal pH range for skin is between 4.5 and 5.5. This range is slightly acidic, which is important for maintaining the skin's protective barrier, known as the acid mantle. The acid mantle helps to keep moisture in and bacteria, pollutants, and other harmful substances out. When the skin’s pH is within this range, it supports healthy skin function and can prevent issues such as dryness, irritation, and acne.

Maintaining this slightly acidic environment is also crucial for the skin's microbiome, which consists of beneficial bacteria that help protect against infections and other skin conditions. When skin pH deviates from this ideal range, it can lead to various skin problems, including eczema and dermatitis. Therefore, products designed for skin care are often formulated to match this pH range to ensure compatibility with the skin and to help maintain its health and balance.