I think of health functional foods because my face has become puffy due to the changing seasons.

This afternoon, I met a friend at a cafe with a nice, sunny window. While enjoying a cup of tea, I happened to look in the mirror. Unlike before, my face looked dull and lifeless, and I was dismayed. I feel like I've reached a point where cosmetics alone aren't enough, so I'm looking into health supplements that can nourish me from the inside out.

I used to find taking nutritional supplements a hassle, but now, looking at myself in the mirror, I realize they're not just optional, they're essential. I'm particularly looking for health functional foods that can help improve skin elasticity and complexion, but with so many different options, it's hard to decide.

What criteria do you use when choosing health functional foods? If you've tried any products consistently and noticed a noticeable improvement in your complexion or improved your condition, could you please share your recommendations?