Not sure if a deep conditioning treatment or a protein treatment is right for your hair? When in doubt, do a strand test! Apply the treatment of your choice to a small section of your hair — just an inch or two, roots to ends — and see how it reacts. If you like the results, you can apply the treatment to all of your hair, or just the parts that need it. If you don’t like the results, you just saved yourself a lot of frustration!