Blond and white hair are more susceptible to sun damage
Bleached and white hair are very susceptible to sun damage and bleached hair are the most affected. White hair acquires a yellow color due to tryptophan oxidation . This is similar to what happens to white wool that yellows after exposure to sunlight. Hair dyeing on the other hand protects the hair shafts from the sun. Never bleach your hair just before a summer vacation!