I'm protein sensitive and my RO conditioner has oat protein in it. That doesn't seem to bother me. I don't use any other protein though.
You'll know if you need it. if your hair is curly and strong then I wouldn't do it just because you "should".
3C/Fine to Medium/Low Porosity/High Density
CJ Gentle Cleansing Shampoo
DB Pumpkin Seed Curl Moisturizing Conditioner
CJ Smoothing Lotion
Queen Helene Sculpturing Gel & Glaze
No Salts, No Waxes, No Butters, No Heavy Oils
No ACV, No Saponified Oils, Protein Sensitive