When Skincare Advice Goes Viral: What New Dermatology Research Means for Brands

Beauty content travels fast. A routine filmed in a bathroom can reach millions of people before a dermatologist has seen it. Two studies presented at the EADV Congress 2026, a major dermatology congress held in Vienna, one of them covered by Allure on 7 October, put numbers on what that speed can cost.

What the TikTok study found

In one of the first studies of its kind, a team led by Dr Maria Lúcia Paysano looked at viral Korean skincare and "glass skin" content on TikTok. Using a fresh account with no viewing history, the researchers screened the top videos for five Korean skincare search terms in May 2026 and assessed 38 of them in detail.

Almost 95% contained at least one potentially misleading claim. 84% failed to account for different skin types. 45% promoted excessive combinations of active ingredients without appropriate safety guidance, and 32% promised instant results.

Safety information was largely missing. Only one of the 38 videos mentioned irritation risk, and only two addressed sun protection. None mentioned the risk of contact dermatitis, none recommended consulting a dermatologist, and none cited an external source. Nearly 82% were made by non-physician influencers, 11% by beauty brands and 8% by other beauty content creators. None were made by dermatologists.

What clinics are seeing

A separate observational study, led by Dr Ouissal Hormi, followed 94 dermatology patients over 12 months. Each had developed a new or aggravated skin condition after using cosmetic or dermatological products promoted on social media.

Irritant contact dermatitis was the most common diagnosis, in 42% of these patients. 28% had acne that started or significantly worsened, 12% had rosacea flares or rosacea-like dermatitis, 11% developed post-inflammatory hyperpigmentation and 7% had superficial chemical burns.

The products most often involved were chemical exfoliants with AHAs or BHAs (34% of cases), over-the-counter retinoids (27%), vitamin C serums (14%) and niacinamide products (11%). Almost half of the patients (48%) had adopted complete routines inspired by social media, and 63% were using more than three active ingredients at the same time. According to Allure's coverage, about a third of the patients had no known history of skin problems.

The study is small and describes patients who were already seeing a dermatologist, so it says little about how often these reactions happen among everyone who follows online routines. It does show a clear pattern behind them: several strong actives, layered together, copied from content made for a general audience.

The researchers' own nuance

Both teams were careful about where they place the problem. Gentle cleansing, hydration and barrier care, the core ideas behind Korean skincare, remain sound principles. The risk appears when those ideas become a single viral routine for every skin, with the safety information removed along the way.

"Combining several active ingredients can place excessive stress on the skin barrier since some have overlapping irritant effects," said Dr Hormi. "Our message is simple: 'Viral' does not necessarily mean safe, validated or suitable for everyone."

Dr Paysano added that dermatologists have an opportunity to take part in these conversations and make evidence-based skincare information accurate, accessible and engaging. Dermatologists quoted by Allure made a similar point: social media is a useful place to learn about products, as long as people check what suits their own skin and introduce new products one at a time.

What this means for brands

At ÉDELSKIN, we read this research as a question of trust. A brand usually knows far more about its products than any viral video shows: how each formula was developed and tested, which skin types it suits, which ingredients it should not be layered with, and how long results realistically take. That knowledge is the brand's strongest asset on discovery platforms, and it often gets lost between the lab and the feed.

Carrying it to consumers takes steady, practical work. Claims stay clear and backed by evidence. Timelines stay honest. Content speaks to specific skin types and explains how a product fits into a simple routine. Questions in comments and messages get careful answers, and the team keeps reading which messages people understand and act on.

This is how we work with brands. We act as an extension of the brand's own team, close to the consumer in each market, finding the right consumers for each product and building demand with information people can trust. The brand stays in its owner's hands, and every message stays true to its science.

The same applies in markets where short video shapes the first purchase. In China, for example, many consumers discover skincare on Douyin and Xiaohongshu, and the brands that explain their products carefully there earn repeat buyers and recommendations over time.

The two EADV studies are a useful reminder for everyone in beauty. Consumers want guidance, and they are looking for it on social media. Brands that answer with clear, skin-specific and honest information give them a reason to keep coming back.

How does your brand make sure its advice stays accurate once it starts travelling on social media? We would be glad to hear how you approach it.

Sources

• Allure, Korin Miller, "A New Study Links TikTok Beauty Routines to These Inflammatory Skin Conditions", 7 October 2026: https://www.allure.com/story/social-media-skin-care-routine-study-2026
• EADV press release, "Almost 95% of viral Korean skincare and 'glass skin' TikTok videos contain misleading claims, new study shows", 30 September 2026: https://eadv.org/wp-content/uploads/2026/09/EADV_2026_Maria_Ouissal_TikTok_Press_Release_30_09.pdf
• Paysano, M. L., Talah, B. A. D., Elias, M. C., & Kreuz, M. "Glass Skin or Barrier Breakdown? Evaluating the Quality and Safety of Viral Korean Skincare Routines on TikTok." EADV Congress 2026, Vienna, Austria (30 September to 3 October 2026)
• Hormi, O., El yamani, L., Moujahid, S., Denna, S., Zerrouki, N., & Zizi, N. "When skincare trends go wrong: Dermatologic complications of viral social media products." EADV Congress 2026, Vienna, Austria (30 September to 3 October 2026)