Shampoo is generally considered acidic. The pH level of shampoo typically ranges from 3.5 to 9.0, with most falling between 5.5 and 7. Hair itself is naturally acidic with a pH level of around 4.5 to 5.5. This means that acidic shampoos are closer to the natural pH of hair, which can help to prevent damage and maintain healthy hair.
Here's why acidic shampoos are better for your hair:
- Help close the hair cuticle: The hair cuticle is the outermost layer of hair that protects the hair shaft. An acidic shampoo helps to close the hair cuticle, making hair smoother, shinier, and less prone to frizz.
- Reduce frizz: An acidic shampoo can help to reduce frizz by smoothing down the hair cuticle and making hair more manageable.
- Improve shine: An acidic shampoo can help to improve shine by reflecting light more effectively off the hair shaft.
- Less likely to cause damage: An acidic shampoo is less likely to cause damage to the hair because it is closer to the natural pH of hair.
While many shampoos are acidic, alkaline shampoos do exist. These are often used for specific purposes, such as treating dandruff or clarifying hair. However, it is important to note that alkaline shampoos can be more damaging to hair than acidic shampoos.
In summary:
- Acidic shampoos are generally better for hair health and can help to prevent damage, reduce frizz, and improve shine.
- Most shampoos are acidic, with a pH level between 5.5 and 7.
- Alkaline shampoos can be more damaging to hair and are often used for specific purposes.
