Anything with high chemicals. Alcohol is a huge one that's in a LOT of hair products that really damages your hair after a long period of uses. But you can shop around and find product Alcohol free so yeah hope this helps :) Heat also damages hair. Straighting irons, curling irons, and blow dryers. But you can find shampoos and conditioners that can repair and prevent damage. :)
It slightly damages it.
Of course, the chemicals in the products we use to dye our hair is very drying to our hair which damages it, just not as worse as bleach but still damages it.
dryness
Heat on hair damages it regardless..Try a CHI...
Garnier Nutrisse is the best because it least damages your hair and has the best colours. I've tryed other brands but they didn't work for me
Yes! hHair spa damages hair.
YES! all hair color dye's damages hair but usually the professionals know what ingredients are in the hair dyes and how to work with them. With box dyes their is ingredients that can damage the hair worse.
It can straighten peoples hair, if of course, people want it straight. But, it severely damages your hair.
no it damages ur hair folicles.. it can cause ur hair to die and look like hay texture!
dont use straightners as it damages the hair.....oil ua hair twice in a week
Heat dries out your hair and damages it. Read this: http://holleewoodhair.org/2012/05/18/hair-101/
you shoul your hair natural! dying your hair damages it, plus i think natural hair is much better then pink or blue hair ;)