If blacklisted ingredients appear in the products, the best decision you can make is to get rid of them and find better alternatives/ make your own using the recipes you'll learn in a later challenge. However, if you decide to buy new products, take your time to really research them. It can feel like there is such a rush to change your whole hair care routine. But, you have to be careful not to buy more products in a hurry; otherwise, you could still end up with something you not too happy with.