Is glass skin bad for your skin? A dermatology study presented at the European Academy of Dermatology and Venereology Congress in September 2026 looked at exactly that question, by reviewing the most-watched glass skin tutorials circulating online right now. What the researchers flagged was what the videos teaching the aesthetic routinely leave out.
Across five Korean skincare search terms, researchers assessed 38 of the top-performing videos using two recognised video quality scoring tools. Nearly 95 percent contained misleading claims. Only one of the 38 mentioned any risk of irritation. Two mentioned sun protection. None advised viewers to see a dermatologist, and none were made by one. Google Trends data cited alongside the study shows search interest in "glass skin" spiking from late 2025 into 2026, which tracks with how often the look has shown up in our own feeds this year.
If you're in your 30s, 40s or beyond and chasing that dewy, poreless finish, this matters more than it would for a passing trend. Your skin barrier is the thing doing the long-term work: holding onto moisture, keeping out irritants, and giving actives like retinol and vitamin C the stable base they need to work properly. Damage it chasing a look, and you can set your skin back further than the trend was ever going to move it forward.
What the study actually found inside the videos
The glass skin method popularised online often stacks several toners, essences, serums and moisturisers in a single sitting, sometimes seven layers of hydrating toner in one go. Dr Jane Yoo, a board-certified dermatologist and Mohs surgeon in New York, says patients following these extended routines are often disrupting their skin's own exfoliation signals without realising it. The poreless-looking finish the trend promises isn't something layering can deliver either. Pore size is largely genetic, and products applied on top of skin don't change that.
Dr Maria Lúcia Paysano, a dermatology resident and co-lead author of the study, flagged a specific pattern across the videos reviewed: routines encouraging multiple active ingredients with no mention of skin type, tolerance or irritation risk. Around 45 percent of the videos recommended combining several actives with no safety guidance at all, and close to a third promised results that would show up almost immediately. That combination, several unfamiliar actives with no guidance and a promise of instant results, is a reasonable description of how a lot of online skincare content works now. It's rarely stated that plainly.
The American Academy of Dermatology, cited in the same reporting, points to a straightforward mechanism behind the breakouts and irritation that follow: layering too many products onto the skin at once can clog pores and trigger irritation, especially when some of those products contain actives that weren't designed to be combined. Dr Mona Gohara, a board-certified dermatologist and clinical professor at Yale School of Medicine, puts it plainly: none of the videos driving this trend were made by a dermatologist, and it shows in what gets left out of them.
None of this is new, if you've been following skin cycling or skin flooding conversations over the past few months. Both of those trends, at their better-explained edges, are about matching fewer, more deliberate steps to what your skin can tolerate on a given night. Glass skin, as it's been taught in most viral tutorials, pulls in the opposite direction: more steps, more often, with less explanation of why any particular one is there. The EADV researchers weren't arguing against hydration or against Korean skincare traditions. They were pointing out that the online version of this trend has drifted a long way from the dermatological thinking it claims to be based on.
A real case: from seven-step glow to a compromised barrier
One case documented in the reporting involved a woman in her late twenties with naturally dry skin who built a glass skin routine around repeated toner layering. She described compromising her own skin barrier repeatedly, from using too many products in one sitting. The result wasn't the poreless glow she was chasing. It was small, persistent red bumps that, when she pushed through and kept layering rather than easing off, became more noticeable rather than less. She only saw things settle once she cut steps rather than adding more.
Most tutorials don't mention that pattern: more product tends to mean more irritation, rather than more glow. Korean skincare as a philosophy is traditionally built around gentle, incremental steps matched to your own skin's actual needs. What changes the outcome is what happens once that idea gets compressed into a seven-step video built for watch time rather than for the skin of the person watching it.
The early signs your barrier is already under strain
Dr Gohara lists several signs worth watching for if you've been layering heavily: skin that feels tight, itchy or tender to the touch, visible inflammation, flaking or scaling, and patches that look redder or darker than the skin around them. None of these tend to show up overnight. They build gradually, which is exactly why a routine can feel like it's working for a few weeks before it quietly stops.
If any of that sounds familiar, the fix is fewer steps for a while, giving your skin the chance to recover its own rhythm before you add anything back in.
Why this matters more once you're past your 20s
Someone younger with resilient, fast-turnover skin can sometimes get away with a heavier routine for a while before anything visibly goes wrong. Skin that's a little older generally doesn't bounce back from barrier disruption as quickly, and a compromised barrier shows up as exactly the things you're already trying to avoid: dullness, uneven texture, redness that won't settle, and fine lines that look more pronounced because the skin around them is dehydrated rather than genuinely ageing. If your goal is skin longevity rather than a single dewy photo, protecting the barrier is the foundation the rest of your anti-ageing routine sits on.
This is also where the usual spring-into-summer product pile-on tends to make things worse rather than better. As the weather warms and routines shift to account for more sweat, more sunscreen reapplication and more time outdoors, it's tempting to add rather than swap. A barrier that's already managing heat and UV exposure has even less tolerance for seven layers of toner than it would in a cooler month.
A quick way to audit your own routine
You don't need a dermatology study to check whether your own routine has quietly drifted into glass-skin territory. Count your steps on a typical night, including anything you only do "sometimes," and be honest about the real number. Then check whether you could explain, in one sentence each, what every single product is for. If you can't say why a step is there beyond "it was in the video," that's usually the step worth questioning first.
It's also worth checking whether you introduced more than one new active in the same week. Dr Paysano's research point about routines skipping tolerance and irritation guidance applies just as much to your own bathroom shelf as it does to a tutorial. Adding a new serum, a new acid and a new mask in the same seven days makes it genuinely difficult to know which one is behind any reaction that follows, which means you end up guessing rather than adjusting with any real precision.
What a dermatologist-backed routine looks like
Dr Yoo, who is Korean American, says she typically recommends a four-step routine rather than the seven, eight or nine steps shown in viral tutorials: a gentle cleanse, a hydrating step, a treatment step suited to your actual skin concern, and sunscreen in the morning. The glow most people associate with "doing more" tends to come from skin that's well hydrated and not inflamed, rather than from the number of bottles on the shelf.
Dermatologists' advice for a barrier that's already under strain is consistent and genuinely simple. Pause scrubs, exfoliating acids and retinoids for a stretch. Switch to a gentle, pH-neutral cleanser and use lukewarm rather than hot water. Lean on a barrier-supporting moisturiser. Don't skip sunscreen, even while you're easing off everything else. None of that requires seven steps, just the right few, used consistently.
Getting the glow without the setback
Our Antioxidant Gel Cleanser was built around that same idea: a non-stripping formula that clears away makeup and daily impurities without disturbing the barrier underneath it, which makes it a sensible first step whether you're easing back into a routine after over-layering or trying to avoid needing to in the first place. Pair it with a shorter list of products you understand the purpose of, rather than a longer list borrowed from a video, and the glow most people are chasing tends to follow on its own. Healthy, well-hydrated skin reflects light more evenly than irritated skin ever will, and that's all "glass skin" was describing before it became a seven-step performance.
For anyone building, or rebuilding, a routine around skin longevity rather than this month's trend, a resilient barrier is what lets every other product in your routine, from a vitamin C serum to a retinol night cream, do its job over months and years rather than days. Chase that first, and the result looks a lot like glass skin anyway. It's what well-looked-after skin tends to look like.
If you've noticed any tightness, redness or flaking after trying a heavier routine recently, easing off is the move the research and the dermatologists quoted in it both point to, not pushing through for another week to see if it settles on its own. Your skin, and whatever you're layering onto it next, will work better for the patience.