Serum chống lão hóa với Niacinamide và Axit Hyaluronic

The tightening effect is real and almost immediate, but what really surprised me was how hydrated my skin stayed all day without feeling greasy. I've been using it for a little over a week and fine lines around my eyes look softer.

My skin feels noticeably firmer after just a few days, and that immediate tightening effect is no joke—it really smooths things out. The hydration from the hyaluronic acid is perfect under makeup, too.