Radiant Theory Skin Now we will know how this cream work on our skin? What are the big reasons that have those effects and make our skin dull? Collagens are the main reason for our skin damage and make it dark. There are many other reasons are pollution, dust, sun rays have. This skincare concludes with proper and natural ingredients that moisturize your skin deeply. The substance of this cream effect in deep collagens. And you will get a golden brighten glow inside.