Mad Hippie Vitamin C Face Serum ($28)
One of the star ingredients in this vitamin C serum (besides the obvious) is ferulic acid, which is a match made in heaven when paired with vitamin C. Like vitamin C, ferulic acid is an antioxidant, but what makes it extra unique is that when it's combined with other antioxidants, it boosts their effectiveness. Unsurprisingly, shoppers who've tried it have noticed its brightening benefits. "I was looking to add something into my skincare routine that brightened my skin and lightened some acne scaring - and this is it! I've been using it for about 3 months now, so I feel confident in saying it really works," writes an impassioned reviewer. "I have someone ask me almost daily what skincare I use! This never happened before, and this serum is the only thing I've added to my routine. I can visibly see a difference in how bright and youthful my face looks when I use this!"
