I’ve tried serval high end vitamin C serums, and this product has provided the most dramatic improvement in my skin. I use to suffer from terrible acne, which left me with scarring, but after using Threefold C Serum it has faded them almost entirely! I also have noticed a huge difference in the texture and brightness of my skin. I love putting it on every day because it smells wonderful & I know I’m protecting and healing my skin! Thanks MM <3