my heir had hated protein for a long time but my curls were limp so I used a rinse put with protien and my hair perked back up. However I used the protein rinse out for a week and my hair became dry. I did a deep treatment last night and my hair is back to normal. so once a week for my protein rinse out but I just got a shampoo with protein in it so that will be my dose evey few days. I cant leave protein in my hair