Is Sun In good or bad for your hair? I always say…”Sun In is no fun in your hair!” My #TBT shout out goes to …Sun In. When Summer comes along I start to see some slightly brassy brunettes and dark blondes out there. Seems that no one over the last 35 years has picked up on the fact that this stuff is basically peroxide with some lemon scent. This stuff can only work on a dirty blonde to begin with. In hair world a level 1 is black and a level 10 is blonde. Most people who I have seen use this stuff are darker level 4 people, when only a level 7 a.k.a known as dirty blondes can really get away with using this at all. If one does use it, it is a fast acting lightener so if you keep using it over summer it will eat your hair up and dry it out. What happens is a level 4 or 5 brunette picks it up and thinks they will have highlights in their hair. It will basically just do what plain old peroxide will do to the hair…lift it but not deposit color. When you lift a darker hair color even a dark blonde it will go diffuse your natural pigment but not deposit a color to cancel it out. Permanent professional hair color lifts and deposits. All this Sun In does is just lift…no deposit. It is mistaken as a hair color and Sun In is not hair color. The girl on the bottle doesn’t highlight her own hair with it I can bank on that! Her highlights were done in pro salon, its such a crock of B.S! This bottle of 8 buck juice cannot condition your hair and color it to a California sun kissed blonde. My advice to darker natural hair color heads out there….get it done professionally! If your a blonde naturally…use some lemon juice if you feel like putting something in your hair while sun bathing. Leave the blonding to the pro’s.