The question of facial oil before or after moisturiser is one of the most common sources of confusion in skincare routines. Many people assume that applying oil to already damp skin will trap excess sebum, leading to breakouts, while others fear that applying it last will prevent the moisturiser from absorbing correctly. The reality lies somewhere in between, dictated by the molecular size of the products you use and the specific benefits you aim to achieve.
Understanding the Layering Principle: Texture Before Thickness
The golden rule for layering skincare is based on consistency, often summarised as "thinnest to thickest." This principle dictates that water-based products should be applied before oil-based ones. Moisturisers, even if they are labelled as "light," are typically water-based emulsions. Facial oils are, by definition, anhydrous and dense. Applying your facial oil before or after moisturiser incorrectly disrupts this barrier; if you apply oil first, it creates a greasy barrier that prevents the subsequent moisturiser from sinking into the skin, sitting awkwardly on top instead.
The Case for Applying Oil Last
For the majority of face oils, applying them after your moisturiser is the most effective method. When you apply a moisturiser first, it hydrates the skin by drawing in moisture. Sealing that hydration in with a facial oil acts like a protective sealant or occlusive layer. This prevents transepidermal water loss (TEWL), ensuring the moisture your skin just absorbed stays locked in for longer. This method is particularly beneficial for individuals with dry or mature skin who need that extra barrier to maintain suppleness.
The "Sandwich Method" for Maximum Hydration
If your skin feels that your regular moisturiser isn't providing enough lasting hydration, the "sandwich method" is a highly effective technique. This approach involves applying a light layer of moisturiser, then your facial oil, and then another thin layer of moisturiser. Essentially, you are using the oil as an intermediate locking layer between two water-based products. This allows the active ingredients in the initial moisturiser to penetrate, while the oil ensures that the final layer of cream does not evaporate too quickly, resulting in deeply plump skin.
When to Apply Oil First
There are specific scenarios where applying facial oil before or after moisturiser makes sense, specifically before a moisturiser. If you are using a targeted serum that is oil-soluble—such as those containing vitamins A, D, or specific herbal extracts—applying a light oil first can enhance the penetration of those active ingredients. The oil acts as a transport mechanism, carrying the actives deeper into the skin. Following this with a moisturiser seals everything in place.
Individuals with combination or oily skin often benefit from applying a lightweight oil before their moisturiser. In this context, the oil isn't adding greasiness but rather balancing the skin. When skin is stripped of its natural oils, it can overproduce sebum to compensate. A few drops of a non-comedogenic oil applied before a gel-based moisturiser can regulate sebum production and provide a balanced, healthy glow without clogging pores.
