Naturium Vitamin C Complex Serum (30ml for $20)
As much as I hate what Susan Yara did, I have to be objective and fair in the assessment of her product. This product contains a 22% vitamin C Complex "made up of a highly stabilized l-ascorbic acid encapsulation, sodium ascorbyl phosphate and bioactive fruit blend". I have had a hyperpigmentation spot on my face since May, and this is the first serum that truly managed to diminish it in record time (yeah, even Skinceuticals couldn't). So yes, it's the best.