If I use too much protein my hair gets straigher and dry and frizzy. When my hair is wet I can feel where the protein has deposited on my hair. I have two spots it seems to do that badly on. I'm not sure why those spots but my hair is always tangly there and a bit straighter and rougher.
Low porosity, medium texture.

If it smells good put it in your hair, if it tastes good spit it out!