If your hair seems damaged then a protein treatment would be a good idea. If your hair is fine then a protein treatment once a week or every two weeks or using a daily conditioner with protein would be a good idea. When hair feels brittle or stiff that usually means your hair has too much protein.
3b/c, medium-coarse, low porosity, low density
HG: Jessicurl Too Shea and Kinky Curly Curling Custard
Shampoo: nonsulfate shampoo and Suave Naturals sulfate shampoo when needed