When a skin cell is born and starts its journey through the epidermis, it’s plump and juicy and filled with about 90% moisture. Visualize a grape. As it travels through the layers nearing the outer and uppermost section of the epidermis, the stratum corneum, it has lost water content along the way. By the end of its journey skin cells in the stratum corneum are believed to have only about 10% moisture content. So, where it started as a grape, it ends up as a raisin.
This makes sense though when you think about what the skin’s number one job is: protection. We want a strong, fortified outer layer to guard against intruders. We cannot underestimate the importance of maintaining proper surface hydration of our skin.
We’ve rounded up 10 facts about your skin and moisturizers from to help you increase your skincare knowledge.
- The skin’s #1 job is protection. We want a strong, fortified outer layer of protection to guard against intruders.
- When a skin cell is born and starts its journey through the epidermis its contents are about 90% moisture. By the end of its journey, a skin cell’s moisture content will have decreased to about 10%.
- Natural moisturizing factor (NMF) helps maintain proper hydration by attracting and absorbing water from the atmosphere and holding on to it with naturally present water-soluble compounds.
- NMF is only found in the stratum corneum (the outer and upper most section of the epidermis).
- Moisturizers are typically made up of ingredients that fall into the following categories: humectants, emollients and occlusives.
- Humectants attract water and include ingredients like hyaluronic acid, panthenol, glycerin, and Sodium PCA.
- Emollients act as lubricants and soften the skin. Emollients are found in ingredients such as jojoba oil, squalene and wheat germ.
- Occlusives help slow water loss and evaporation and can be found in dimethicone, cyclomethicone and caprylic/capric triglyceride.
- Dehydrated skin is not functioning optimally which means the skin’s natural exfoliation process is disrupted which can lead to dull, flaky, lackluster skin. It can also contribute to easily irritated, sensitized, reactive skin.
- In cold winter conditions it’s important for skin therapists to add an extra moisture boost in the treatment room while also offering clients an extra dose of hydration at home.