Almost 95% of viral Korean skincare and 'glass skin' TikTok videos contained at least one potentially misleading claim, according to new research presented at the European Academy of Dermatology and Venereology (EADV) Congress 2026. Basic safety information was largely absent: of 38 videos assessed, only one mentioned irritation risk and none recommended consulting a dermatologist.
The finding matters because these routines reach millions of viewers, and the study found none of the videos were produced by dermatologists. The researchers were careful to separate the two issues. Korean skincare itself is not the problem — gentle cleansing, hydration and barrier care are sound principles. The problem is what social media does to them: viral, one-size-fits-all routines stripped of the safety context that makes them usable.
For routine-builders, the practical takeaway is to treat viral 'glass skin' videos as entertainment, not instruction, and to check any routine against your own skin type before trying it. Our skincare guides are built around that step, and it is the one viral content most often skips.
What the study actually found
Researchers analysed videos related to popular Korean skincare and 'glass skin' routines in May 2026. 'Glass skin' is a popular term for clear, smooth and deeply hydrated skin. To minimise algorithmic bias, they used a neutral account with no prior engagement history and screened the top videos across five Korean skincare-related search terms. After exclusions, 38 videos were assessed for dermatological claims, safety information, quality and reliability using the Global Quality Scale and a modified DISCERN tool.
The numbers were consistent across measures:
- Almost 95% contained at least one misleading claim.
- 84% failed to account for different skin types.
- 45% promoted excessive combinations of active ingredients without appropriate safety guidance.
- 32% promised instant results.
- All videos were classified as unreliable or less reliable, and none cited an external source or reference.
According to Macau Business, lead author Dr Maria Lúcia Paysano said: "What surprised us most was how consistently basic safety information was absent." Only one of the 38 videos mentioned irritation risk, only two addressed sun protection, none mentioned contact dermatitis risk and none recommended consulting a dermatologist.
Who is making these videos
The authorship breakdown explains a lot of the quality gap. Nearly 82% of the videos were created by non-physician influencers, 11% by beauty brands and 8% by other beauty content creators. None were produced by dermatologists.
That is not an argument that only doctors should talk about skincare. It does mean the videos were almost never made by people whose first obligation is safety context. An influencer optimises for watch time; a brand optimises for sales. Neither has a structural reason to mention that stacking several active ingredients — the exfoliating acids and retinoids that feature in many routines — can irritate skin when combined without guidance.
Why the missing safety information matters
Dr Paysano's warning is the study's most useful line for readers. "Following these routines without individualised guidance may contribute to irritation, over-exfoliation, acne flares or skin barrier disruption, particularly when multiple active ingredients are combined," she said. That is a list of specific, plausible harms from doing too much at once — not a claim that any ingredient is dangerous on its own.
Two absences stand out. First, sun protection: only two videos addressed it, even though many routines involve exfoliating ingredients. If you are adding acids to your routine, our guide to how to wear sunscreen every day covers the step the viral videos skipped. Second, irritation risk: only one video mentioned it. The unglamorous defence here is testing a product before it touches your whole face — see how to patch test a new skincare product before adding anything new.
The 'glass skin' framing is part of the problem
Thirty-two percent of the videos promised instant results. That promise is doing specific work. Deeply hydrated, smooth skin is a reasonable goal, but it is built by consistent, boring steps over time — and a routine framed as an instant transformation has no incentive to tell you about the adjustment period, the skin-type differences, or the point at which you should stop.
The study's authors put it plainly: consumers should be cautious of content promising instant or universal results. Universal is the word to watch. A routine that ignores skin type — as 84% of these videos did — is a routine that will behave differently on your face than on the one in the video.
What to do differently
The researchers' framing gives you a checklist for evaluating any viral routine:
- Does it account for skin type? If not, it is not written for you.
- Does it combine multiple active ingredients without safety guidance? That is where the study flagged over-exfoliation and barrier disruption risk.
- Does it promise instant results? Treat that as a red flag, not a selling point.
- Does it mention irritation, sun protection or when to seek help? If a video covers none of these, it is missing the basics the study found almost universally absent.
If a combination routine has already left your skin stinging or tight, recovery is a matter of stripping back and supporting the barrier — our guide on how to repair your skin barrier sets out the signs and a sensible plan. And if you are layering products at all, the order matters; how to layer skincare in the right order covers the sequence that keeps steps from cancelling each other out.
The gap the study exposes
Dr Paysano summarised the core finding as "a clear gap between the popularity of this content and the quality of the information provided." That gap is the real story. The demand for Korean skincare and 'glass skin' routines is genuine, and the underlying principles — gentle cleansing, hydration, barrier care — are sound. What is missing is the middle layer: the skin-type caveats, the waiting periods, the sun protection and the stop signs that turn a viral video into something you can safely follow.
Until that layer shows up in the videos themselves, the burden falls on the viewer. Build the routine from sources that state their caveats, add one product at a time, and be suspicious of anything promising that your skin will change overnight.
