If a certain amount of specific ingredients recognized by the Ministry of Food and Drug Safety are added, it is recognized as a functional cosmetic.
However, since it contains only a small amount of ingredients, it is only slightly more effective than regular cosmetics and is not much different.
This is why you don’t feel any change even after using functional products.
On the other hand, cosmeceuticals are attracting attention in terms of effectiveness by using ingredients made by pharmaceutical companies or research institutes with their own technology and disclosing test results proving their skin-improving function.