OST Original Pure Vitamin C20 Serum VS Pure Vitamin C21.5 Advanced Serum by Wishtrend

I have to admit, I’ve had trouble distinguish these two Korean vitamin C serums from each other in the past. They look almost the same. Well, here’s the difference! Last week, I shared some incredible before and after photos of my sister’s skin. She cleared out her acne and pimples thanks to Korean skin care. … Continue reading OST Original Pure Vitamin C20 Serum VS Pure Vitamin C21.5 Advanced Serum by Wishtrend