What Exactly Is 'Slugging'?
Despite the unappealing name, the concept is simple: slugging is the practice of applying a thin layer of an occlusive product, like petroleum jelly, as the final step in your nighttime skincare routine. The name comes from the glossy, shiny finish it leaves
on your skin, which some say resembles the trail of a slug. The purpose isn't to add moisture itself, but to act as a barrier. This seal dramatically reduces transepidermal water loss (TEWL)—the process of water evaporating from your skin overnight. By trapping moisture, it makes your skin's own hydration more effective and allows any serums or moisturizers underneath to work without evaporating.
From Niche Forums to Viral Sensation
While dermatologists have recommended occlusives for decades to heal compromised skin, slugging as a beauty trend gained widespread popularity through K-beauty communities and Reddit forums before exploding on TikTok. Influencers showcased before-and-after results, especially for dry, irritated, or flaky skin, transforming a long-standing dermatological principle into a viral ritual with millions of views. Its success was fueled by its simplicity and accessibility; unlike expensive gadgets or rare ingredients, anyone could try it with a cheap, widely available tub of Vaseline, Aquaphor, or CeraVe Healing Ointment.
The Dermatologist's Take: Effective, But Not for Everyone
From a dermatological standpoint, slugging is highly effective for its intended purpose. Studies have shown that petroleum jelly can reduce water loss through the skin by up to 99%. It is particularly beneficial for those with dry, sensitive, or mature skin, or for people whose skin barrier is compromised from using strong actives like retinoids. However, it’s not a one-size-fits-all solution. Experts caution that those with oily or acne-prone skin should proceed with care. While petroleum jelly itself is non-comedogenic (meaning it doesn't clog pores), it can trap oil and bacteria against the skin, potentially leading to breakouts, congestion, or small white bumps called milia.
More Than a Trend: The 'Barrier Repair' Revolution
The real impact of slugging wasn't just in the technique itself, but in the conversation it started. Its popularity marked a significant cultural shift away from the harsh, stripping routines that dominated the 2010s—think aggressive scrubs and high-concentration acids. Instead, consumers became laser-focused on a new buzzword: the skin barrier. The idea of protecting and repairing this outermost layer of skin went mainstream. Suddenly, the market was flooded with products featuring ceramides, niacinamide, and Centella asiatica—all ingredients aimed at soothing and strengthening the skin's natural defenses. Slugging was the DIY, budget-friendly gateway to this new philosophy of nurturing skin rather than attacking its flaws.
A Return to Simplicity in a Complicated Market
In many ways, slugging was a quiet rebellion against the beauty industry's push for excessive consumption. It challenged the narrative that effective skincare had to be complicated and expensive. The trend proved that a single, affordable, and widely available product could deliver visible results, empowering consumers to look past marketing hype and focus on fundamental ingredients and techniques. This minimalist mindset has persisted, leading to the rise of 'skinimalism' and hybrid products that aim to streamline routines. Slugging reminded everyone that sometimes, the most powerful solutions aren't found in a fancy bottle with a high price tag, but in a simple product that has been trusted for generations.
