Hair has never been dyed before and heat such has ironing and curling is very limited (1-3 a year). Natural oils are occasionally treated into hair (always before bed, because if the treated hair is exposed to lights, damage may be caused). I do not drink or smoke. Hair is cut regularly to avoid split ends. I wash my hair every three days, applying shampoo only in the roots and conditioner in the ends. Hair texture is naturally straight.