* Skin: The skin's surface, known as the acid mantle, typically has a pH between 4.5 and 5.5. This slightly acidic environment is crucial for maintaining skin health.
* Hair: Hair's natural pH is also slightly acidic, generally between 4.5 and 5.5, similar to the skin.
It's important to note that these are general ranges, and individual pH levels can vary depending on factors like age, genetics, diet, and the products used on the skin and hair.