Effects of Over-the-Counter Shampoos on Hair Color
There's a question I can't seem to get a straight answer on. Does using over-the-counter shampoos cause color fading due to their high pH levels? This article explores the common belief that salon products are the best for maintaining hair color, while over-the-counter shampoos can lead to quicker fading.
Alkalinity and Hair Color Fading
The main concern with over-the-counter shampoos is their high alkalinity (pH), which can lead to cuticle opening and color molecule escape. This is due to the cuticle layer swelling, allowing color pigments to migrate out of the hair shaft. In contrast, salon products have an acidic pH, which helps to seal the cuticle layer, reducing color fade.
How pH Affects Hair Health
Excessive alkalinity can also irritate the scalp and cause discomfort. For instance, a high pH of 7 in baby shampoo, which is designed for sensitive skin, can still lead to color fading despite being less harsh than other over-the-counter shampoos. This is because the pH difference between baby shampoo (pH 7) and regular hair care products (typically between 5.4 to 5.8) is significant enough to cause faster color fading.
Baby Shampoo and Hair Color
Baby shampoo, despite being a gentle cleanser, is not the best choice for hair color maintenance. Its pH of 7, which matches the pH of the eye, can lead to quicker color fade due to its higher alkalinity. This is why it's recommended to avoid using baby shampoo on colored hair. It's important to note that baby shampoo is not a gentle shampoo by design and is intended for use on infants, not colored hair.
Ingredients and Sulfates
Baby shampoo and other over-the-counter shampoos like those found in pharmacies may contain sulfates, which are responsible for producing lather. While lather might not be necessary for effective cleaning, the issue with sulfates is that they can be harsh on colored hair, leading to faster fading. Additionally, sulfates can cause scalp irritation if used regularly on colored hair, as they have a pH of 7 or higher.
It's crucial to avoid sulfates if you're concerned about the longevity of your hair color. Instead, opt for shampoos that are specifically designed for color-treated hair, which are usually more gentle and have a pH balance that supports color retention. These shampoos are typically manufactured to maintain or even enhance the longevity of hair color.
Conclusion
In conclusion, while over-the-counter shampoos can help maintain healthy hair, they may not be the best choice for preserving colored hair. Using a suitable color-retention shampoo is essential to avoid unwanted color fade. Understanding the pH levels of different products and their effects on your hair can help you make more informed decisions about your hair care routine.