Here's why:
* Peroxide is a bleaching agent: It lifts the natural pigment from hair, which can leave the hair feeling drier and more brittle. This can make hair appear thinner.
* Damage: Peroxide can damage the hair shaft, causing it to become weaker and more prone to breakage.
While some hair dyes contain peroxide, the purpose is to lift the natural pigment to allow the new color to deposit. It's not intended to make hair thicker.
To improve the appearance of thin hair:
* Focus on hair health: Use gentle shampoos and conditioners, avoid heat styling, and get regular trims to prevent split ends.
* Use volumizing products: Styling products like volumizing mousse or spray can create the illusion of thicker hair.
* Consider hair extensions: If you want a temporary thicker look, hair extensions are a good option.
Remember, it's important to consult with a professional hair stylist to discuss your hair goals and find the best products and techniques for your specific hair type.