K-beauty in your 30s is all about prevention and repair—because this is the decade when your collagen dips, fine lines settle in, and your skin needs a little extra love. Korean skincare offers some of the most advanced and innovative solutions to help maintain a youthful, radiant complexion. By focusing on the right featured ingredients and tools, you can improve your skin even through your 30s and achieve the coveted K-beauty glow. Here are the top three must-dos with skin…