BlowDrying on Cool

I hope someone responds to this, I've been wondering about the effects of blow-drying on cool also.

Heat is the primary cause of hair damage when drying your hair; hence, drying on a cool setting is less of a hazard. However, any roughing up of the cuticle, especially when hair is wet, can fray hair and cause breakage. That's why brushing hair when wet and using tension with a brush and dryer to straighten can be hard on hair, especially when used in conjunction with heated hair.

However, blow drying even on a warm setting occasionally won't kill your hair unless it's extremely fragile to begin with or overly processed. When you first begin drying the water is simply evaporating off your hair--it's aiming a hot dryer onto bone dry hair that can really cause damage. It's also a good idea to hold the nozzle several inches from your hair.