![]() Best rule of thumb is to store your vial in a cool, dry place (obviously) and use it up within six months to a year. But thanks to science, modified versions of the ingredient (that are water-soluble, etc.) last longer so they can do your skin more good. Ascorbic acid (vitamin C), for instace, can oxidize and lose efficacy over time. But for a pretty decent reason! Remember that bit about being super concentrated and potent? You are getting your bang for your buck here.Ĭertain potent ingredients often found in serum can become unstable once they come in contact with air. Yes, serums tend to be on the pricier end of the skincare spectrum. In Korea, for example, Estee Lauder’s Advanced Night Repair Serum is called an “essence.” However, it’s mostly a difference in marketing. If anything, they differ in texture Serums are gooier and more concentrated, while essences are watered-down with a more fluid texture (ex. Based on where they come in the routine (after cleansing, before moisturizing) and what function they serve (targeted skincare needs besides simple hydration) serums and essences are very similar. There are so many products out there and everybody claims that it’s the best, so consumers are confused as to what works for them."Įssentially. They're supposed to keep the cream and whatever you put underneath moist during the entire day. The oil-based serums go on top of the moisturizer because they have a bigger molecule. They nourish the inner layer of the skin because the molecule is very small so it penetrates-because of the P50, of course. Water-based serums go under the cream and they are so important. Use whichever floats your boat, with Aida Bicaj's soothing voice in your head, saying these words: "You have the water-based serums and the oil-based serums. Though, as the face oil trend grows (and there are more and more oils on the market), more oils are marketed as 'serums.' Office favorite Vintner's Daughter Active Botanical Serum comes to mind-it's very much a face oil. What's the difference between serum and face oil? Read the label, but once a day will probably cover your bases. Face lotions and creams are richer and create a barrier on top of the skin to keep all that good stuff in. ![]() But, that doesn't make them moisturizers in the traditional sense. Serums can be chock-full of moisturizing ingredients (hyaluronic acid, ceramides) to help skin retain moisture. This makes them a great tool for targeting specific skincare concerns, like wrinkles. Serum is particularly suited to this task because it is made up of smaller molecules that can penetrate deeply into the skin and deliver a very high concentration of active ingredients. ![]() Serum is a skincare product you can apply to your skin after cleansing but before moisturizing with the intent of delivering powerful ingredients directly into the skin. We hear skincare talk makes great party ice breakers. There's not going to be a test, but study up anyway. Skincare should never stress you out (that would sort of defeat the purpose), so we pooled our collective knowledge, did a bit more research, and compiled a cheat sheet of sorts. It can be watery, but is it essence? So many questions and we haven't even gotten to ingredient lists yet! It can be oily, but it's not necessarily face oil. Think of the contradictions: It's moisturizing, but you still use moisturizer. Even if you're the proud owner of several serums, it's not a particularly clear product on it's surface. You are not alone in having no earthly idea what a serum is.
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