My face looks dull as the seasons change. Has anyone tried the Meladuce Ampoule?

Last weekend, I met up with some old high school friends. As we all got older, the conversation naturally turned to health and skin care. Under the bright lights of the cafe, I was upset because my complexion looked particularly dull and my freckles seemed more prominent. A friend recommended the Meladuce Ampoule. I guess I was the only one who hadn't known about it. When I got home, I looked in the mirror for a while, and finally searched for the Meladuce Ampoule. Perhaps because I'm starting to see more blemishes, I'm starting to feel that moisturizing alone isn't enough. Has anyone in the community tried the Meladuce Ampoule? I'm curious if it's irritating, and if it brightens my skin with consistent use. If you're concerned about dull skin like I am, please share your skincare routine.