I want to find skin whitening methods other than cosmetics!

hello

I am an office worker in my 20s. Lately, I am increasingly worried that my skin tone is getting duller.

My skin wasn't particularly fair to begin with, but perhaps due to increased outdoor activities over the past few years and work stress, it has become darker and looks lifeless. In particular, as blemishes, pigmentation, and dark circles caused by fatigue are gradually worsening, it bothers me every time I look in the mirror.

I usually apply sunscreen meticulously and use basic skincare products like Vitamin C serum. However, I haven't seen the results I expected, so I'm wondering if there are other methods. I've tried all the cosmetics listed below, but I haven't seen any effect... Besides whitening cosmetics, are there any foods or lifestyle habits that can help improve skin tone? Should I even consider medical procedures?

More than anything, I want clear and radiant skin rather than just whitening it. I would be truly grateful if anyone who has had similar concerns could share their experiences or helpful tips!