I am not one to fill out a review, however after using the Zinc C Serum; I have noticed a drastic difference in the overall tone and health of my skin. I have very sensitive, acne-prone skin. After using the Zinc C Serum for only two weeks, the redness on my face is almost completely gone and any blemish marks that I had have honestly disappeared. I am truly in disbelief and for anyone with problematic or hyper-pigmented skin; I would highly, highly recommend this product.