K-beauty has a branding problem in the West. Mention it, and most people immediately picture glass skin , snail mucin and a 10-step skincare routine that takes longer than your morning commute. But after making the 16-hour trek to Seoul, I discovered something far less glamorous — and weirdly more life-changing — tucked between sheet masks and lip tints: Korean toothpaste. Yes, toothpaste. And not the sad, aggressively minty tube languishing next to your sink. One of the best souvenirs I