Have you ever noticed that on each tube, for example tooth-paste tube has a small colored line. Now I am going to tell you what they mean. They range between: black, dark brown, dark blue, dark ref (generally dark colors)Dark squares indicate that the product you are using is composed entirely of chemicals, it means the product has 0% natural ingredients! Red squares indicate that the product in approximately 70% chemicals and 30% from natural products. Green boxes indicate that you have used the product without chemicals! 100% natural substances!There, now you know.