Hair Damage From Colouring. Opt For Color-Safe Products. Henna has a pH of around 55 much closer to that of skin than any chemical hair dye.
It doesnt damage the hair. I went ultra-blonde last spring and Im still paying the price for it. All permanent hair coloring processes use hydrogen peroxide to develop the color.
Hair colouring does not cause hair loss.
To do this it makes your hair swell allowing the bleach to reach the inner part of the strand. When you expose hair to ammonia hydrogen peroxide and high pH chemicals that are often present in dyes you damage your hairs lipid layer. Pollution can build up on the fibre and cause it to snap. Loss of hair strength less ability for your hair to handle heat styling reduced hair thickness increased roughness of hair follicle.