From black tea and green tea ferments to soybean and rice ferment extracts, fermented ingredients have become a K-beauty staple, boosting hydration, improving texture and leaving skin with a visible glow. Aside from targeting a wide range of concerns, fermented ingredients can also supercharge the effectiveness of skincare ingredients compared with their non-fermented counterparts. “The fermentation process allows microorganisms such as yeast and bacteria to break down larger, more complex molecules into smaller, more bioavailable components,” says Dr. Marie Jhin, board-certified dermatologist and founder at Premier Aesthetic Dermatology. “These byproducts — such as amino acids, peptides, organic acids and antioxidants — are better able to penetrate the skin and are more readily recognized and utilized by skin cells.”Ferments also support the skin barrier and resilience. “They help reinforce the lipid matrix by improving ceramide function and reducing transepidermal water loss,” explains Jhin. And if hydration is your goal, fermented extracts act as natural humectants, helping skin hold onto water for a soft, supple, plump feel.Because fermented ingredients are supportive rather than corrective, they’re flexible in any routine. “They should typically be applied after cleansing and before heavier serums or creams, as their lightweight texture allows for better absorption,” says Dr. Whitney Hovenic, double board-certified dermatologist, Mohs surgeon and co-founder of sun care brand Spooge. “When combining with actives like retinol, vitamin C, or acids, fermented products can act as a buffer for irritation and reinforce the skin barrier.” She recommends using fermented essences or serums before retinoids at night to improve tolerance, or after vitamin C in the morning to add hydration and calm potential sensitivity.Ahead, we’ve rounded up 10 high-performing K-beauty products, including essences, toners and ampoules, that are perfect to layer into your existing routine.A daily essence for deep hydration “Essences in particular are well suited for fermented ingredients, as they are designed to condition the skin early in a routine, enhancing absorption and preparing the skin for subsequent steps,” says Jhin on the products that deliver fermented ingredients most effectively. Following her guidance, we’ve spotlighted the mixsoon bean essence. Packed with fermented soybean, barley, pomegranate and Korean pear, it hydrates deeply, gently exfoliates and smooths skin texture. Fermented soybean locks in moisture, while the other ferments soothe redness and combat early signs of aging. Use daily as a hydrating essence after cleansing and toning. Promising review: “I really love this essence! It feels lightweight on the skin and absorbs quickly without feeling sticky. My skin looks smoother, more hydrated, and with a natural glow. Perfect for daily use and works great under makeup. Highly recommend!” — NahomyA hydration hero for stressed skin Combining fermented centella and ceramides, the SKIN1004 Madagascar Centella Probio‑Cica intensive ampoule is a hydration hero for skin that’s dry, stressed or prone to redness, and works to soothe inflammation, support the skin barrier and leave your complexion smoother and more balanced. Its lightweight, fast-absorbing texture glides on effortlessly without a sticky finish, making it easy to layer into any routine. Promising review: “I’ve been using this on recovery nights, especially after exfoliation or tretinoin, and it’s been amazing for calming redness and rehydrating my skin. The texture is milky and absorbs quickly — no stickiness, just soothing moisture. My skin always looks plumper and more even the next morning. If your barrier’s feeling stressed, this is a must-have. Gentle, effective, and a total skin-saver.” — NataA fruit-powered peeling gelThe ma:nyo Galactomy Enzyme peeling gel combines fruit enzymes with Galactomyces Ferment Filtrate, a fermented yeast extract rich in vitamins, amino acids and minerals, to gently lift away dead skin cells and impurities, leaving skin smoother and brighter. That said, board-certified dermatologist Dr. Hadley King points out that those with acne-prone or Malassezia-sensitive skin may react to products containing Galactomyces Ferment Filtrate, sometimes triggering breakouts or congestion due to interactions with certain skin microbiomes. “As with any skincare ingredient, patch testing is important, especially for those with reactive or acne-prone skin,” says King. Promising review: “This product is insane. It is incredibly quick to ball up and leaves your skin feeling squeaky clean. I felt literally no residue on my skin after rinsing with just water. This honestly calmed my psoriasis, I felt zero sensitivity with this product. I definitely recommend following up with a good hyaluronic serum and moisturizer to restore the skin barrier and probably don't use this more than 1-2x / week.” — Julien BrundrettA moisturizer that packs 77% peach extract This lightweight moisturizer is packed with 77 % peach extract, delivering vitamins, minerals and antioxidants to hydrate deeply and nourish skin for a healthy, dewy finish. The Anua Peach 77% niacin enriched cream also features several fermented ingredients, including Lactobacillus ferment, Saccharomyces ferment filtrate, Galactomyces ferment filtrate and Bifida ferment lysate, which support skin resilience and improve absorption. Hovenic notes that Bifida ferment lysate is one of the few fermented ingredients known for their universal tolerance. “Their small molecular size, due to fermentation, allows for better absorption and makes them suitable for most skin types.” Promising review: “(Daughter’s review) I am currently on my 3rd tub of this lotion, and I can confirm it is everything I need. It smells amazing, and I love the packaging. It comes with a little lid and spoon so you don't contaminate the lotion with your dirty hands. Despite me slathering a bunch of this lotion on my sensitive, super dry, oily, acne-prone skin, it still feels lightweight and I've had no issues with it thus far. This lotion is the last step of my 3-4 step skincare routine, yet my face doesn't feel super sticky. Overall, great quality, and would recommend to everyone with a similar skin type as me.” - WayneA serum powered by fermented green tea According to King, fermented ingredients don’t replace potent actives like retinoids or exfoliating acids, but work in a complementary way. “While retinol and acids actively stimulate cell turnover or collagen production, fermented ingredients enhance skin function more indirectly, by improving hydration, strengthening the barrier and increasing ingredient bioavailability.” Following her guidance, we’ve spotlighted the Innisfree Retinol Green Tea PDR Firming & Smoothing serum, which targets fine lines and wrinkles, uneven texture and loss of elasticity. The formula blends a 56% concentration of Green Tea PDRN, a fermented lysate derived from Lactobacillus ferment of Jeju green tea, with 1% Triple Retinol Complex to visibly firm, smooth and leave skin bouncy. Promising review: “This is an amazing retinol serum, it keeps my skin so hydrated, soft and healthy looking. It’s vegan which is very important to me and the ingredients are amazing. I love using this product daily for the best results. The texture is so soft and not oil. It keeps my face looking fresh throughout the day. Highly recommend this serum.” — alyna1234 A toner that boosts moisture and glow A post-cleanse must-have, the haruharu Wonder black rice hyaluronic toner hydrates deeply and preps skin for serums and creams. Hyaluronic acid and beta‑glucan lock in long-lasting moisture, while fermented black rice extract brightens, supports elasticity and calms irritation. With 95 % naturally derived ingredients, this vegan toner is gentle enough for most skin types, including sensitive skin. Promising review: “Finally found a toner that does something for the skin. Hydrates and makes application of serum or moisturizer glide on. Great to find a product that does not have any fragrance or niacinamide good job haru haru.” — CathyToner pads that pack 50 fermented extracts Give dull, textured skin a boost with the Numbuzin No.3 Radiance Glowing jumbo essence pad, soaked in an essence with 50 fermented extracts like soy, rice, grape and algae to nourish and condition. The hypoallergenic formula also combines niacinamide and adenosine to even skin tone, brighten and improve fine lines and elasticity, making it ideal for daily use after cleansing. Promising review: “These #3 glow pads are everything! I have the pads as well as the bottle of the toner and just find these pads to be so much more pleasant to use and more effective. This product gives nice moisture while plumping your skin and as it drys your skin is plump and glowing. I enjoy laying a few pads on my face like a mask for a few minutes works great as these are very thin but sturdy wipes. Highly recommend for any with looking to add hydrating, glowing dewy skin. Glass skin!” —Troy H.An eye cream formulated with soybean ferment For targeted anti-aging care, the K-Secret Seoul 1988 eye cream combines 4% retinal liposome, a vitamin A derivative that helps reduce fine lines, wrinkles and sagging, with soybean ferment to boost hydration, support elasticity and strengthen the delicate eye barrier. Use at night for best results, since retinal can oxidize in sunlight. Promising review: “This has quickly become a staple. I've ordered multiple times - I use it for eye and neck areas with little irritation. Yes, there is some minor flaking due to the retinol but I easily control that with using it alternate days. I've noticed my crows feet and under eye lines have faded. I'm not falling for the expensive popular creams that claim to do wonders but does nothing. I'm coming back to this over and over. Hard to beat the price and results.” — SueA cleansing balm that feels like silk With its silky balm-to-oil texture, the BANILA CO Clean it Zero pore clarifying cleansing balm melts away makeup, sunscreen and excess oil without stripping moisture, making it an ideal first step in any double-cleansing routine. Several of the line’s formulas like Tea Tree-EX, Avocado+, and Cica-Relief, are enriched with Lactobacillus Ferment to support a healthy skin microbiome and keep skin clearer and healthier-looking. Promising review: “I tried the Clean It Zero cleansing balm and I was pleasantly surprised by how well it works. It melts makeup easily, even waterproof products, without the need to rub harshly. The texture is very smooth and feels gentle on the skin, and it rinses off clean without leaving a greasy residue. My skin feels clean, soft, and hydrated after use, with no irritation. I also appreciate that it has no strong scent and works perfectly as the first step in a double cleansing routine. I will definitely keep using it and highly recommend it, especially for daily makeup users.” — Yannis Molina Muñoz A sunscreen that protects, hydrates and boosts glow For glow, comfort and protection in one easy step, the Then I Met You essence light sunscreen delivers SPF 50 PA+++ UVA and UVB protection while doubling as a hydrating skincare step. Formulated with Galactomyces Ferment Filtrate, it helps boost hydration, support the skin barrier and enhance radiance, all while absorbing quickly with no greasy feel or white cast. Promising review: “This sunscreen has changed the game for me! It feels more like skincare than SPF, super lightweight, no white cast, and gives my skin a fresh, glowy finish. I have combo-dry skin and it layers beautifully under makeup. No pilling, no greasy feel. It’s my new go-to every morning!” — arymua87