i dont think that oils have protein in it. im protein sensitive and i use oils every day. i also dont know if henna has any protein in it either might need to check that one out. too much protein isnt just the cause of too much protein, your hair would feel really dry and almost like strew. if your hair is really dry you would just need more moisture.
thats just what i think though.

my hair: 3b, high porosity, high density and coarse hair (i think i finally figured that all out)
my hair loves conditioner only styling!
Oils and my own procuts are my hairs best friend
my hair goal length is bra strap length when curly.