How do Koreans get their hair so healthy?

I've often wondered, how do Koreans manage to achieve such lustrous, healthy hair? Is it a secret regimen of shampoos and conditioners? Do they have access to special treatments or vitamins that the rest of us are missing out on? I'm eager to learn the tricks of the trade and incorporate them into my own hair care routine. So, how do they do it? Is there a specific diet or lifestyle habit that contributes to their enviable locks? I'm intrigued and hope to uncover the answers to these questions.