Have not used it on a system (system is on its way), but when I did have a lot hair I only used Renpure. They have different types of shampoo and coconut/argan oil are two of them. For a system, I'd assume the Argan oil will be best-- that shampoo also has some UV protection so that may help more for a system (I'd assume). I love there products and been using them for awhile. No complaints for me--