Your vitamin C serum turning brown? 🤢 ⁠ ⁠ That means it's oxidized and basically useless for your skin. Here's why most people struggle with vitamin C and how to actually get those glowing results ⁠ ⁠ As a dermatologist, I see this mistake ALL the time. Save your money and learn what actually works 👆⁠ ⁠ #vitaminc #skincare #dermatologist