So what does this mean? It means that most anything you put on your face dries, as the water evaporates, to form a layer between the Stratum Corneum and your surroundings. This is why you feel as if the ingredients are being absorbed into your skin. Not all of the moisture evaporates because it is trapped by any dead skin cells still on the face. In addition, much of the layer is disappearing during the day as you sweat, the humidity, and as your skin breaths. One should keep in mind that the same time the products are creating a barrier, they are also helping to nourish the barrier. Furthermore, your skin looses about 40,00 cells a day, so as the cells shed, you loose some of the moisture provided by the skin products.
Even some of the ingredients we rely on to help our faces are unable to penetrate down to where they are most effective. For instance, collagen needs to pass through to a lower layer known as the dermis since the molecules are too large. Even the hyaularonic acid cannot get down to where it needs to be due to it's nice even though it is naturally produced by the skin.
On the other hand, ingredients such as Vitamin C are able to travel down though the Struatum Corneum to where it is able to do the most good by triggering collagen production. In addition, there are six substances - avobenzone, oxybensone, octocrylene, homosalate, octisalate, and octinoxate, that have such small molecules, they can penetrate down through the skin down to the blood system but scientists do not know what happens to them as it has not been studied before.
No matter what, most of your skin care products do not go past the outer layer of skin so you really don't need to worry. If you are concerned, make sure none of those ingredients are in your product. Let me know what you think, I'd love to hear. Have a great day.
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