Skip to main content

The Ingredients Behind K-Beauty's Biggest Hits in 2024–2025

If you follow K-Beauty at all, you have probably noticed a shift. A few years ago, the conversation was all about snail mucin and sheet masks. In 2024 and 2025, the ingredients getting attention are different. They sound more medical, more clinical, more like something you would hear in a dermatologist's office.

That is not a coincidence. The biggest trend in Korean skincare over the past two years has been what the industry calls the "medicosmetic pivot" — ingredients that were originally developed for medical or pharmaceutical use, now showing up in over-the-counter skincare products on the shelves of Olive Young.

We looked at the five ingredients that defined K-Beauty in 2024–2025 and checked their regulatory status across 10 countries.

1. PDRN — the "salmon DNA" ingredient

PDRN stands for Polydeoxyribonucleotide. On product ingredient lists, PDRN products are typically listed under the INCI name Sodium DNA.

If you have been on skincare TikTok in the past year, you have almost certainly seen PDRN. It went from a niche Korean clinic treatment to one of the most talked-about skincare ingredients worldwide. Medicube, VT Cosmetics, and Biodance all launched PDRN-based products that sold out repeatedly at Olive Young in 2024 and 2025.

What it does: PDRN was originally used in wound healing and post-procedure recovery in Korean dermatology clinics. It is derived from salmon DNA (though vegan alternatives now exist). In skincare, it is marketed for skin repair, hydration, and collagen support.

What "salmon DNA" actually means: PDRN is extracted from salmon sperm cells. The DNA fragments are broken down into small polynucleotide chains that can interact with skin cells. The INCI name "Sodium DNA" refers to the sodium salt form of these DNA fragments.

Why it blew up: Korean dermatology clinics have offered PDRN injections for years. When brands started putting the same ingredient into topical serums and ampoules at accessible price points, it bridged the gap between clinic treatments and daily skincare. TikTok creators started calling it "salmon DNA" and the ingredient went viral globally.

Regulatory status:

Market Status
All 10 markets in our database No restrictions

Sodium DNA has no regulatory restrictions in any of the 10 countries we track. It is freely permitted as a cosmetic ingredient without concentration limits.

2. Glutathione — the brightening antioxidant

Glutathione has been used in Korean skincare for years, but it hit a new level of popularity in 2024–2025 as the global demand for brightening products surged.

What it does: Glutathione is a tripeptide (a molecule made of three amino acids: glutamic acid, cysteine, and glycine) that functions as an antioxidant. In skincare, it is used primarily for brightening — it can inhibit melanin production, which is why it appears in products targeting uneven skin tone, dark spots, and dullness.

Why it trended: The rise of "glass skin" as a global beauty goal pushed demand for brightening ingredients. Glutathione offered something different from Vitamin C — it works through a different mechanism (inhibiting tyrosinase, the enzyme involved in melanin synthesis) and tends to be less irritating. Korean brands like Medicube incorporated it into serums alongside PDRN and peptides.

Regulatory status:

Market Status
All 10 markets in our database No restrictions

Glutathione has no regulatory restrictions as a cosmetic ingredient in any of the 10 markets we track. It is not classified as a drug ingredient in cosmetics contexts, though oral glutathione supplements are regulated separately in some countries.

3. Tranexamic Acid — from prescription to serum

Tranexamic Acid is one of the clearest examples of K-Beauty's medicosmetic pivot. It is a pharmaceutical ingredient — originally developed to control bleeding — that Korean formulators adopted for skincare.

What it does: In dermatology, Tranexamic Acid is used to treat melasma and post-inflammatory hyperpigmentation. It works by interfering with the interaction between skin cells and melanocytes (the cells that produce pigment). In K-Beauty serums and toners, it is used at lower concentrations to target dark spots, redness, and uneven skin tone.

Why it trended: Consumers increasingly want "clinical-grade" ingredients without a prescription. Tranexamic Acid fits that demand. It is gentler than hydroquinone (a traditional depigmenting agent that is banned or restricted in many countries), and it pairs well with other trending ingredients like Niacinamide and Vitamin C. Anua, Cos de BAHA, and other Korean brands launched Tranexamic Acid serums that gained traction on Reddit and TikTok.

Regulatory status:

Market Status Max
Taiwan Restricted 3%
ASEAN Restricted 3% (skin products only, not for mucous membranes)
All other markets (EU, Korea, Japan, US, China, Canada, Brazil, Argentina) No restrictions as cosmetic ingredient —

Tranexamic Acid is the only ingredient on this list with regulatory restrictions. Taiwan and ASEAN both cap it at 3% in cosmetic products. The remaining 8 markets have no concentration limits for cosmetic use. In several countries, higher concentrations of Tranexamic Acid are classified as pharmaceutical products and require a prescription.

4. Centella Asiatica — still the #1 soothing ingredient

Centella Asiatica (commonly called "cica") is not new. It has been a K-Beauty staple since the late 2010s. But it deserves a spot on this list because it has not slowed down. If anything, it got bigger in 2024–2025.

What it does: Centella Asiatica is a plant extract containing active compounds — primarily madecassoside, asiaticoside, madecassic acid, and asiatic acid. These compounds are documented for anti-inflammatory, wound-healing, and collagen-stimulating properties. In skincare, cica products target irritated, sensitive, or damaged skin.

Why it stayed on top: Cica is the foundation ingredient for several of K-Beauty's biggest brands. Skin1004, Dr. Jart+, COSRX, and Aestura all build product lines around Centella Asiatica. The ingredient continued to grow in 2024–2025 partly because of the post-procedure skincare trend — consumers who get laser treatments, microneedling, or chemical peels at dermatology clinics reach for cica-based products during recovery.

On ingredient lists, you will see it appear in multiple forms: Centella Asiatica Extract (the whole plant extract), Madecassoside (a specific active compound), Asiaticoside (another active compound), or Centella Asiatica Leaf Water.

Regulatory status:

Market Status
All 10 markets in our database No restrictions

Centella Asiatica Extract has no regulatory restrictions in any of the 10 countries we track.

5. Niacinamide — in everything, for a reason

Niacinamide (Vitamin B3) is not a 2024–2025 trend. It has been a K-Beauty core ingredient for over a decade. It is on this list because of its sheer dominance — it appears in an extraordinary number of products across every category, from toners to sunscreens to serums.

What it does: Niacinamide is a water-soluble vitamin that addresses multiple skin concerns at once: it can reduce the appearance of pores, even out skin tone, strengthen the skin barrier, and reduce inflammation. It is one of the few ingredients with published research supporting multiple claims.

Why it is everywhere: Niacinamide is stable, inexpensive to formulate, works well with almost every other ingredient, and is tolerated by most skin types. It does not conflict with retinoids, acids, or vitamin C (despite a persistent internet myth to the contrary). For formulators, it is an easy addition that improves almost any product. For consumers, it is one of the safest "active" ingredients to start with.

In the Beauty of Joseon Relief Sun (covered in our previous article on ingredient lists), Niacinamide sits at position #8 — above the 1% line, meaning it is present in a meaningful concentration.

Regulatory status:

Market Status
All 10 markets in our database No restrictions

Niacinamide has no regulatory restrictions in any of the 10 countries we track. No concentration limits, no labeling requirements, no use-type restrictions.

What stands out across all five

Four out of five trending ingredients have zero regulatory restrictions in any of the 10 markets we track. Only Tranexamic Acid faces limits, and only in two markets (Taiwan and ASEAN at 3%).

This is worth noting because many consumers assume that "clinical" or "medical-grade" ingredients face heavy regulation. For these five ingredients, the regulatory picture is permissive across the board.

Ingredient INCI name Restrictions
PDRN Sodium DNA None in 10 markets
Glutathione Glutathione None in 10 markets
Tranexamic Acid Tranexamic Acid Taiwan 3%, ASEAN 3%
Centella Asiatica Centella Asiatica Extract None in 10 markets
Niacinamide Niacinamide None in 10 markets

Compare this to UV filters — where the same ingredient can be legal in Korea at 10%, capped at 3% in Japan, and completely unavailable in the US. The regulatory fragmentation that defines sunscreen chemistry barely exists for these trending skincare actives.

How to spot these ingredients on a label

If you want to find these ingredients in your own products, here is what to look for on the ingredient list:

  • PDRN: Most commonly listed as "Sodium DNA" on the ingredient list. If the product says "PDRN" on the front, check the back for "Sodium DNA."
  • Glutathione: Listed simply as "Glutathione."
  • Tranexamic Acid: Listed as "Tranexamic Acid." Some products abbreviate it as "TXA" on the front label, but the INCI list will spell it out.
  • Centella Asiatica: Can appear as "Centella Asiatica Extract," "Centella Asiatica Leaf Water," "Madecassoside," "Asiaticoside," "Madecassic Acid," or "Asiatic Acid." Different forms indicate different processing methods and active compound concentrations.
  • Niacinamide: Listed as "Niacinamide." Sometimes labeled as "Nicotinamide" on older products, but the INCI standard is Niacinamide.

Methodology and Sources

Trend data is based on industry reports (BeautyMatter 2026 K-Beauty Forecast, Trendier AI data), Olive Young sales data, and TikTok/Reddit community tracking.

Regulatory data was cross-referenced against a database of 21,796 cosmetic ingredients with regulatory records spanning 10 countries. Each ingredient's INCI name was verified and its regulatory status confirmed across all 10 markets.

The database is available as an API at K-Beauty Cosmetic Ingredients on RapidAPI.

Important Notice: This article is for informational purposes only. It is not legal, regulatory, or medical advice. Cosmetic regulations change frequently — always verify current status against official sources before making business or personal decisions. For full terms, see our Disclaimer.

Decoded Korea publishes data-driven analysis of Korean cosmetic ingredients, chemical regulations, and safety data.

Labels:

Comments

Post a Comment

Popular posts from this blog

Your 20% Vitamin C Serum Has No Concentration Limit. In Any Country.

Vitamin C serums are sold at 10%, 15%, 20%, and sometimes 30% concentration. These are high numbers for an active ingredient. For comparison, the EU recently capped retinol at 0.3% in most cosmetics. So how is 20% vitamin C legal when 0.3% retinol is the EU limit? Because no country regulates L-Ascorbic Acid concentration in cosmetics. None of the 10 markets in our database — EU, Korea, Japan, China, Taiwan, ASEAN, Brazil, Argentina, the US, or Canada — has a limit. 76 forms of vitamin C Our database contains 76 ingredients with "Ascorbic" or "Ascorbyl" in their INCI names. Vitamin C in skincare is not a single ingredient — it is a family of compounds, each with different stability, potency, and skin penetration characteristics. The ones consumers encounter most often: Form INCI name Characteristics L-Ascorbic Acid Ascorbic Acid Most potent, least stable. Requires low pH. The form used in 10–20% serums MAP Magnesium Ascorbyl Phosphate Stable,...
Post a Comment
Read more

Retinol Had No Limits in Most Countries Until the EU Set Them in 2024

Retinol is probably the most recommended ingredient in skincare. Dermatologists recommend it. Beauty editors rank it above everything else. K-Beauty brands put it in serums, creams, and sleeping masks. It has decades of published research behind it. For most of that history, most countries did not regulate how much retinol a cosmetic product could contain. Canada had a limit (1.0% Retinol Equivalent), but Korea, Japan, China, the US, and the EU had none. That changed in April 2024, when the EU adopted Regulation 2024/996 and set concentration limits well below Canada's. We checked our database to see how this compares across 10 countries. What retinol is Retinol is a form of vitamin A. In skincare, it promotes cell turnover — old skin cells shed faster, new ones replace them. This is why retinol is used for fine lines, uneven skin tone, acne, and texture. It is one of the few cosmetic ingredients with clinical evidence supporting its anti-aging claims. Retinol is not a single...
Post a Comment
Read more

Banned in Europe, Legal in Korea: 5 Ingredients That Split Global Regulators

The same moisturizer that sits on a shelf in Seoul could be pulled from a store in Paris. Not because of a labeling error or a packaging defect — but because an ingredient inside is classified differently by two governments looking at the same scientific data. This happens more often than most consumers realize. The EU and South Korea — both major cosmetics markets with sophisticated regulatory systems — frequently disagree on where to draw the line. The EU's cosmetics regulation (EC 1223/2009) maintains one of the strictest banned substance lists in the world, with over 1,600 entries in Annex II. Korea's MFDS takes a different approach, often allowing the same ingredients under specific concentration limits or without restriction. Neither system is wrong. They operate under different regulatory philosophies: the EU leans toward the precautionary principle — restrict first, revisit later. Korea tends toward risk management — allow under controlled conditions, monitor outcomes...
Post a Comment
Read more