At what pH is a product considered acid-balanced?

A product is considered acid-balanced when its pH ranges between 4.5 and 5.5. This pH level is optimal for maintaining the skin's natural barrier, known as the acid mantle. The acid mantle consists of natural oils, sweat, and sebum, which protect the skin from environmental factors and pathogens. It is slightly acidic, typically around 5.5, and this balance helps to keep the skin healthy, hydrated, and less prone to breakouts or irritation.

Using products outside this pH range can disrupt the skin's natural balance. For example, a product with a much higher pH, like 8.5, can be too alkaline and may strip the skin of its natural oils, leading to dryness and irritation. Conversely, a product with a pH below 4.0 or around 0 is excessively acidic, which can also cause harm to the skin, resulting in irritation and potential damage to the skin barrier.

Therefore, the pH range of 4.5 to 5.5 effectively supports the skin's health and function, making it the standard for what is considered acid-balanced.