【Why does excessive use of “exfoliating” skincare/cosmetics damage the skin’s barrier function? ]

“Skin barrier” is composed of the outermost stratum corneum of the skin, various lipid components on the epidermis, and various natural moisturizing factors on the skin. a “barrier protection layer”.

The “stratum corneum” is an important part of this “skin barrier”, but because the “stratum corneum” is composed of “apoptotic keratinocytes”, it is This “stratum corneum” is often “dull”, making people feel “not hydrated” and affecting appearance. The so-called “dead skin” is actually the exfoliated stratum corneum.

Therefore, in order to maintain a “perfect image”, many people like to use cosmetics with “dead skin/peeling layer” frequently. The “keratinocytes” in the outermost layer of the stratum corneum are removed in advance. Because the “epidermal replacement time” of normal skin is about 28 days, if this “exfoliation/exfoliation” behavior is performed excessively and frequently, it will lead to “excessive thinning” of the stratum corneum of the skin, making the skin The normal barrier protection function is weakened, and it cannot effectively defend against various external stimuli.

So in daily life, these cosmetics/skin care products that “remove dead skin/cuticles” cannot be used at will (frequent use), but should be used according to the actual situation of your own skin. Use properly under the guidance of a doctor or professional to avoid skin damage.