This is really a one of a kind product.  Unlike typical serums that go under moisturizer, this serum is designed to be layered on top of moisturizer to seal it next to the skin while forming a protective veil against environmental damage.  This sheer fluid contains marine DNA so that when your skin comes into contact with free radical generators (sun, pollution) the marine DNA absorbs the free radicals shields your skin's DNA from damage.  For those who need the moisture of a rich cream but want to wear makeup on top or don’t want an oily finish to the skin, this creates a smooth base for makeup but offers skincare benefits that primers do not.  This pairs perfectly with Natura Bissé Diamond Extreme Cream, but works well over any moisturizing cream.