From the manufacturer
Sorry not sure but I like this product so much I just bought 3 more bottles to take me through 2018. Great sale at my hairdresser. I use a dime size on my shoulder length hair every other day I flat iron and use a perfector hair styler (the best) and blow dry daily. Don’t hesitate to buy worth every penny
I have used the product both ways. I think the shine part works better on dried hair.
I have no idea if it contains protein. I do know I didn’t find it any different than a cheaper brand.