She may have coarse hair and that is why protein doesn't work. I have LP hair but on the medium coarse side. I only use products with protein high on the list maybe four times during the year and that is during winter. Most of my products don't have protein. For drugstore conditioners try Tresseme Naturals moisturizing conditioner. Maybe add a little olive or grapeseed oil for slip.

Sent from my HTCEVOV4G using CurlTalk App
3b/c, medium-coarse, low porosity, high density
HG: Jessicurl Too Shea and Kinky Curly Curling Custard
Shampoo: nonsulfate shampoo and Suave Naturals sulfate shampoo when needed