What You Need To Know About Slugging
Ok you might have seen one of my recent tik toks, that I am a huge advocate for slugging. Now that the weather is getting colder, I think it’s the perfect time to go over some of the principles of slugging: what it is, why I love it, and how I personally slug. Keep reading for a bit of a slugging 101 course!
What is Slugging?
Alright, before we get into the “how to slug,” let’s discuss “what” slugging is. Slugging is a skincare practice that involves applying a petrolatum-based product (typically Vaseline or Aquaphor) as the last step of your nighttime routine. What’s funny is it’s become such a social media trend in the last couple of years, but dermatologists have been recommending this technique for years (especially for individuals with dry or compromised skin barriers).
The science behind slugging centers on the use of occlusive agents, which form a physical barrier on the skin's surface. By applying an occlusive like petrolatum, slugging helps to maintain hydration levels and support the skin’s natural repair processes.
Benefits of Slugging
Prevents Transepidermal Water Loss
One of the primary benefits of slugging is its ability to prevent water loss. Studies have shown that petrolatum is highly effective at reducing TEWL by forming a protective layer over the skin. In my recent podcast episode, I discuss the difference between hydration and moisture. Especially in cold and dry environments, I am all about maintaining hydration, and this is one of my favorite hacks for doing so!
Enhances Moisturizer Effectiveness
It not only prevents water from evaporating, but it also helps to enhance the effectiveness of the products applied underneath it. When you apply an occlusive on top of a hydrating product (aka your moisturizer), it traps those ingredients on the skin, allowing them to penetrate deeper and work more efficiently.
Supports Skin Barrier Repair
The skin barrier, composed of lipids like ceramides and fatty acids, plays a critical role in keeping the skin healthy and protected from environmental aggressors. When the barrier is compromised (due to factors like sun damage, harsh skincare products, or underlying skin conditions), it can lead to dryness, irritation, and increased sensitivity. Slugging helps by creating an external barrier that allows the skin to repair itself by maintaining an optimal environment for barrier restoration.
Protective Buffer for Harsh Ingredients
One of the lesser-known benefits of slugging, but one of the most consistent reasons I recommend slugging, is its ability to act as a protective buffer when using potent active ingredients. Whenever someone with sensitive skin is starting out with something like a retinoid, I always suggest applying a thin layer of petroleum jelly on the areas they are the most sensitive FIRST. This is one of my favorite hacks for reducing the risk of irritation without diminishing their effectiveness.
Why I Recommend Slugging At Night
You might be wondering why people typically suggest slugging at night, rather than part of your morning routine. At night, your skin’s permeability increases, allowing it to absorb more moisture and nutrients. By applying an occlusive like Vaseline before bed, I can prevent that moisture loss and create an ideal environment for my skin to restore itself. Also, just from a practical sense, during the day, having a thick layer of petroleum jelly on my skin isn’t ideal for applying sunscreen and makeup.
How Often I Recommend Slugging
While I love slugging (especially in Fall & Winter) and find it highly beneficial, it doesn’t need to be done every night. For most skin types, slugging 1-2 times a week is sufficient. If you have very dry or compromised skin, you may benefit from more frequent slugging, but it’s important not to overdo it. Long story short, try a couple times a week and re-evaluate after a few weeks
What to Avoid When Slugging
One of the most important rules of slugging is to avoid applying it on top of active ingredients like retinoids, AHAs, BHAs, or other exfoliants. These actives can be too harsh when trapped by the occlusive layer, leading to irritation or an intensified reaction. The occlusive prevents the ingredients from evaporating, so they remain on the skin longer than intended. If you use retinol or exfoliating acids, I recommend alternating your slugging nights with nights when you use actives to avoid any adverse effects.
Sample Nighttime Routine for Slugging
Here’s a simple routine that works well for me and that I recommend to my patients:
Cleansing Balm, Cleansing Oil, or Micellar Water: Start with a cleansing balm, oil, or micellar water to ensure all makeup, dirt and sunscreen are cleared.
2nd cleanse: Follow with a gentle, water-based cleanser to ensure your skin is fully clean.
Hydrating Serum: I love using a hydrating serum this time of year to replenish moisture and give your skin an extra boost of hydration.
Moisturizer: Lock in the hydration with a lightweight but nourishing moisturizer that suits your skin type.
Slugging: Finally, apply a pea-sized amount of Vaseline or Prequel’s Skin Utility Ointment over your moisturizer. Focus on areas that are particularly dry, or apply it to your entire face if needed. Don’t forget your lips, it makes for the best chapstick!
For a little more detail, you can read my top suggestions for the best routine for dry, winter months! Pro Tip: In the morning, make sure to wash your face with a gentle cleanser to remove any remaining petrolatum!
I am so excited to hear what you all think of slugging! Have any specific blog requests? Let me know! I would love to hear them.
Hungry for more? Check out my Comprehensive Skincare Guide in the Skinthusiast Shop!
**Disclaimer: This post does not constitute medical advice. Please speak to your Dermatology provider before adding any at home procedures or products into your routine!
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