A Neutrogena sun block was gifted to me on my anniversary. Will this help in giving my skin the required glow and radiance. Since I have an oily skin, how would it react on my skin? Is there any way I can buy more of them if it provides me with what I need for my skin? Since I am allergic to skin creams, will it affect my skin? I am not aware of this product, so will u give me the required information on how to make proper use of Neutrogena sun block to bring a promising glow?