Hydration vs. Moisturization: What Your Skin Really Needs
For as long as I can remember, I believed that any cream would magically solve all my skin issues. But no matter what I used, my skin would still feel tight and dull. That’s when I came across terms hydration and moisturization, and I genuinely thought, Is it not just the same thing with a fancier name? Turns out, it’s not- and learning the difference totally changed how I treated my skin.
How often do you hear from your parents- or on the internet- to drink water? Personally, about 5 to 10 times a day. Drinking water is something everyone should be doing, and there is a standard for it. For a teenage girl, it’s about 2.3 liters (78 ounces) per day, and for a teenage boy, it’s about 3 liters (100 ounces) per day. Drinking water helps your body restore what it loses from breathing, sweating, and urination- and this is what hydration means. Additionally, water loss can happen from harsh chemicals, environmental changes, and simply not drinking enough water. If the water does not get replaced, your body- and your skin- becomes dehydrated.
On the surface, the skin barrier sits on top of the outermost layer of the skin and acts as a shield. It keeps bacteria and pollutants out while locking moisture in. This helps your skin cells retain water. When the skin is hydrated, it feels smooth and smooth, but when you lack hydration, it will feel dry, itchy, and have an uneven complexion.
While hydration is about drinking water, moisturization is a step in your skincare routine that helps seal in the moisture and prevent water loss. The process of losing water through the skin is referred to as transepidermal water loss, or TEWL. When the skin does not naturally produce enough sebum- meaning that the person has dry skin- it becomes more prone to losing water from the skin cells. If the skin barrier is damaged, it faces the same issue, as the skin becomes dry and less able to retain moisture. Losing 300-400 mL of water per day is normal; however, when the skin barrier is damaged, water loss increases, which can lead to chronic dryness.
Skincare products use various ingredients for hydration and moisturization, and some do overlap, especially since there is no direct definition for “moisturization”. One example is humectants. These ingredients elevate skin’s hydration by attracting water from the environment and pulling it up from the dermis (deeper layers of the skin) to the epidermis (the outermost layer). Ingredients like aloe vera, urea, sorbitol, panthenol, glycerin, hyaluronic acid, and alpha hydroxy acids, will hydrate the skin, by attracting water. Also, humectants moisturize the skin, and there are 3 main types. Occlusives, which are oils and lipids that make up a layer on the skin to stop water loss. They include:beeswax, mineral oil, and lanolin. Emollients, which strengthen the skin barrier and stimulate an improvement in skin appearance. They include: fatty acids and fatty alcohols. Lastly, protein rejuvenators. From the name, we can understand that there are proteins that refill essential proteins that make the skin look younger. They include: collagen, keratin, and elastin.
Now that you understand the difference between hydration and moisturization and their ingredients, how do you know which one your skin needs? Well, that depends on your skin type. Many products advertised as moisturizers have hydrating ingredients in addition to moisturizing ones. Different types of ingredients offer their own benefits to the skin.
Humectants are good for rough, thick, and overly dry skin, because they take the moisture from the environment, and from dermis, bringing it to the skin’ surface.
Emollients are again used for rough, dry skin and routine skincare, because they soften and smooth the skin by restoring moisture, and protecting the skin barrier from water loss.
Occlusives are good for preventing dermatitis, which is a chronic red and itchy skin condition. They make a barrier on the skin that secures in moisture and works against bacteria.
When using both hydrating and moisturizing products, the order matters. After washing your face and applying toner, start with a hydrating product- it feels light on the skin because it’s water based. Then, apply any serums or gentle acids. Finally, use a moisturizing cream to seal everything in. These creams are thicker and designed to lock in the hydration from previous steps. Always remember: apply products from thinnest to thickest consistency.
Being able to understand whether your skin needs hydration, moisturization, or both is key to building an effective skincare routine, with a healthy skin barrier. Start listening to your skin- does it feel right? That can help you choose appropriate ingredients. Once you learn to layer products properly and use the correct hydrating and moisturising ingredients, your skin will not only look better but feel healthier. It’s more than just a trend- it’s about knowing what your skin needs.
