Skin so smooth it seems to reflect light like polished glass. That is the promise of the «Glass Skin», a major trend in Korean beauty that has racked up billions of views on TikTok and Instagram.
Behind the dramatic results, the reality is simpler—and more interesting. This routine is based on sound dermatological principles, provided you can distinguish between science and marketing. We’ll walk you through it step by step, with each product put through the BeautyDecoded algorithm’s scrutiny.
⚠ Note on BeautyDecoded reviews: the ratings and review excerpts displayed on this page come from users of the BeautyDecoded application. These reviews are not verified. Publication dates and review details are available on each product sheet.
«Glass skin» refers to a complexion ultra-smooth, radiant, and even, with no visible imperfections or pores. The idea: skin that is so well-hydrated and cared for that it reflects light evenly, creating that signature «glossy» effect.
Let’s be clear from the start: No skincare product can make pores disappear. These are normal anatomical structures that are essential for the skin’s proper functioning. On the other hand, skin that is properly moisturized, exfoliated, and protected looks visibly smoother and more radiant.
That is precisely the goal of this routine, which is based on three pillars: maximum hydration, even skin tone and refined texture.
This is the foundation of the Korean skincare routine. Double cleansing removes both impurities fat-soluble (sebum, makeup, sunscreen) and water-soluble (sweat, dust, pollution).
First phase : A makeup-removing oil or balm dissolves makeup, excess sebum, and sunscreen residue—which water alone cannot do—without stripping the skin’s natural moisture barrier.
Second phase : a gentle, water-based cleanser with a pH level similar to that of the skin.
There’s no need to look for a product that «strips» the skin: skin that feels tight after cleansing is skin with a weakened barrier. That’s the exact opposite of the desired effect.
Product Review: Radiance Cleansing Balm — Beauty of Joseon
4,38/5 — 16 reviews on BeautyDecoded • dry skin 84 • normal to dry skin 91 • suitable for sensitive skin (score 0)
A balm designed for dry to normal skin, ideal for the initial step of removing sunscreen.
4/5 — «It’s pleasant to use, effectively removes sunscreen in the summer, and rinses off easily with water.»
Step 2: Exfoliation, to reveal your skin’s radiance
The buildup of dead skin cells dulls the complexion and accentuates uneven texture. Opt for chemical exfoliants (AHA, BHA) or enzymatic, which are gentler and less harsh than granular scrubs.
Once or twice a week is enough. Beyond that, you get the opposite effect: irritation, redness, and a damaged skin barrier. Anything but flawless skin.
Product Review: Glycolic Acid 7% Exfoliating Toner — The Ordinary
4,89/5 — 45 reviews on BeautyDecoded • oily skin 91 • anti-aging 85 • not suitable for sensitive skin (score -5.5)
The highest rating in this entire selection—and, paradoxically, the lowest tolerance score. Effective, but only for resilient skin, and should be used sparingly (once a week to start). Do you have sensitive skin? Opt instead for an enzyme exfoliant or a low-concentration lactic acid product.
5/5 — «I use it once a week on my face and elbows, and my skin texture is much smoother.»
Step 3: Toner, to prepare the skin
Applied after cleansing, toner helps restore the skin’s pH balance and provides a light initial layer of hydration. Look for the’hyaluronic acid for hydration, or the niacinamide to help regulate oil production. And pat it in with your hands instead of a cotton pad: less friction, less waste.
4,69/5 — 27 reviews on BeautyDecoded • dry skin 91 • oily skin 84 • Use with caution on sensitive skin (score -0.6)
The quintessential hydrating toner: hyaluronic acid in various molecular weights, with high ratings across all skin types—exactly the profile you want for that “Glass Skin” effect. A humectant to start your routine, not a substitute for moisturizer.
5/5 — «I've tried other hyaluronic acid lotions and always come back to it.»
Step 4: Serum, the star of the routine
More concentrated than a cream, the serum targets your skin’s specific needs. No need to layer on ten products: One or two well-chosen products, used consistently, are more effective than a fifteen-step routine. Three options to consider, depending on your priorities.
Texture and Pores: Niacinamide 10% + Zinc 1% — The Ordinary
4,43/5 — 82 reviews on BeautyDecoded • blemishes 79.9 • suitable for sensitive skin (score 0)
Niacinamide improves skin texture and minimizes the appearance of pores. At 10% concentration, tolerance varies: for very sensitive skin, formulations at 4–5% are more comfortable.
5/5 — «I've been using it for 2 years now, my pores are much less visible and my skin is smooth.»
Hydration and Soothing: Madagascar Centella Ampoule — Skin1004
4,39/5 — 35 reviews on BeautyDecoded • redness 68 • normal to oily skin 91 • suitable for sensitive skin (score +0.5)
One of the few products in this selection with a positive sensitivity rating. Centella asiatica, known for its soothing properties, is the best choice for sensitive skin.
5/5 — «Soothes, moisturizes, and leaves skin smooth and refreshed.»
Glow: C Glow Vitamin C — Geek and Gorgeous
4,76/5 — 48 reviews on BeautyDecoded • anti-aging 90.1 • dark spots 90.1 • not suitable for sensitive skin (score -3)
Pure vitamin C is the most well-documented ingredient for a radiant complexion, but its acidic pH requires a gradual adjustment—best used in the morning, always with sunscreen.
5/5 — «An inexpensive and really effective vitamin C serum, light texture.»
Step 5: Moisturizing and sun protection—the finishing touch
Without those last two steps, everything else is pretty much pointless.
Moisturizing cream seals in the moisture provided by the previous steps: a lightweight texture for combination to oily skin, and a richer formula for dry skin.
Sun protection, every morning, with a SPF 30 or higher (ideally SPF 50). It’s the most effective anti-dark spot and anti-aging measure there is—far more effective than any «radiance» serum sold at three times the price.
Product Review: Relief Sun Rice + Probiotics SPF50+ PA++++ — Beauty of Joseon
4,47/5 — 72 reviews on BeautyDecoded • oily skin 91 • blemishes 76.5 • suitable for sensitive skin (score +0.5)
This iconic Korean sunscreen embodies the latest trend: a non-greasy finish, no white residue, and a comfortable texture that makes it perfect for daily use—the true key to an SPF’s effectiveness. Reapplication is essential during prolonged sun exposure.
5/5 — «Finally, a lightweight yet effective sunscreen that absorbs quickly without leaving a greasy film.»
Dr. Sylvain David’s opinion
««Glass Skin» is, above all, a marketing term used to describe something very simple: healthy skin. From a medical standpoint, three elements of this routine are truly relevant—gentle cleansing that preserves the skin barrier, moderate exfoliation, and above all, daily sun protection, which remains the most effective measure against dark spots and skin aging.
What I see most often in my practice are cases of overdoing it: skin barriers damaged by layering acids and ten-step routines copied from social media. My advice: aim for radiant, comfortable skin, not «glass-like» skin. The perfect mirror-like effect in videos owes a lot to lighting, makeup, and filters. Healthy skin has pores, and that’s normal.»
What the BeautyDecoded community has to say
The app’s data tells an interesting story. The two most-reviewed products in this selection are The Ordinary’s niacinamide serum (82 reviews) and Beauty of Joseon’s sunscreen (72 reviews): the community has clearly identified the two true pillars of a radiant complexion—texture and sun protection.
Another finding: the highest-rated product, the glycolic acid toner (4.89/5), also has the lowest tolerance score for sensitive skin (-5.5). Proof that a highly rated product isn’t a one-size-fits-all solution. Conversely, only two products in this routine receive a positive sensitivity score: the Centella ampoule and Beauty of Joseon SPF. If you have reactive skin, this is where you should start.
Tips that really make a difference
Consistency above all else : Results take several weeks to become apparent, not just three days.
A healthy lifestyle : Sleep, staying hydrated, and a diet rich in antioxidants support the skin from the inside out.
Adapt, don't copy : The «perfect» routine you see on TikTok isn't necessarily right for your skin. If you have sensitive skin or are unsure, consulting a dermatologist is still the best step in your routine.
And what about your routine—what’s it really worth?
Further information
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