What kind of health functional foods do you all take these days?

Lately, I've been feeling a bit dull, and I've been really worried. Yesterday, I was shocked when I saw my face reflected in the subway window on my way home from work. I used to be able to pull a few all-nighters and still have makeup on the next day, but now, even with enough sleep, I still feel tired. So, I've been researching various health supplements, thinking I need to take care of myself from the inside out. Honestly, I hadn't really felt the need to take any health supplements before, so I didn't really take them. But when I went to a gathering with friends, everyone always had something suitable for them in their bags. I thought I should start taking care of myself, so I searched the internet, but there are so many options, it's hard to choose. With so many health supplements on the market, it's hard to decide which ones are best for a working person like me. Since I'm just starting out, I want to carefully consider the ingredients. Are there any health supplements you regularly take? Could you share any products that have made you feel lighter or improved your skin condition?