COSRX The 6 Peptide Skin Booster Serum for combination skin
Sodium Hyaluronate
Peptides
N-Acetyl Glucosamine
Niacinamide
AllantoinHigh
- HighCombination Skin Fit
- HighEffectiveness
- HighSafety
One of the best moisturizers for combination skin.
This fit is calculated for the concerns frequently associated with combination skin: an oily T-zone, enlarged pores, and dry cheeks. For scores and recommendations based on your full skin profile, including your 12D face scan results and any goals or preferences you have, please use the Lovi app.
Page built Nov 8, 2026How the Fit score works
Lovi Assistant explains
- Highly suitable for your combination skin, this serum features niacinamide and acetyl hexapeptide-8 to effectively control sebum and improve skin texture, addressing your oily shine concerns.
- The inclusion of multiple peptides like copper tripeptide-1 and polyquaternium-51 further enhances moisturizing and anti-aging effects, contributing to plumper skin and minimized fine lines.
- This formula is safe for your skin, containing no harsh ingredients and posing no risk of irritation.
How to apply
- Use this moisturizer in your AM and PM routine every day to control shine. Always pair with SPF in the morning.
- Apply this moisturizer after your cleanser and toner, right before your morning SPF.
- Gently press a small amount of the moisturizer into your skin and avoid harsh rubbing. Let it ⏳absorb for a minute.
- Apply the moisturizer on slightly damp skin to help it lock in moisture better. This keeps your combination skin balanced.
- Avoid the eye area when applying the moisturizer. Do a patch test before your first use.
People Say
★4.7Overall rating based on 5.4k+ reviewsBased on a very large amount of data, users consistently praise this serum as a lightweight, water-like "booster" that significantly improves skin texture and hydration without heaviness. It is widely celebrated for smoothing pores and creating a "glass skin" glow. A small minority of users with specific sensitivities experienced breakouts or closed comedones.
Highlights
Lightweight & fast-absorbing Mostly Mentioned
- “absorbs instantly like water”
- “non-sticky finish”
- “perfect for layering”
- “feels weightless on oily skin”
Hydrating & plumping Often Mentioned
- “gives a healthy glow”
- “skin feels plump”
- “boosts hydration levels”
- “glass skin effect”
Improves skin texture Often Mentioned
- “skin feels softer immediately”
- “smoothed out my texture”
- “pores look smaller”
- “reduced roughness”
Gentle & non-irritating Sometimes Noted
- “no stinging on sensitive skin”
- “soothing application”
- “great for barrier repair”
- “gentle enough for daily use”
Caused breakouts Rarely Noted
- “gave me closed comedones”
- “caused tiny whiteheads”
- “broke me out after a week”
- “bad reaction for acne-prone skin”
Ingredient sensitivities Rarely Noted
- “reacted to the niacinamide”
- “contains soy oil (allergy warning)”
- “caused redness/flushing”
No visible results Rarely Noted
- “did absolutely nothing”
- “just expensive water”
- “no change in fine lines”
- “saw no difference after a bottle”
Sticky residue Rarely Noted
- “felt slightly tacky”
- “left a sticky film”
- “clashed with other products”
- “too slimy”
Sources: lovi.care, ulta.com, sokoglam.com, yesstyle.com, oliveyoung.com, amazon.com, and more
Questions and answers
What makes COSRX The 6 Peptide Skin Booster Serum a great fit for combination skin?
This serum is a great fit for your combination skin because niacinamide and peptides help control oily shine and improve skin texture. It also delivers deep moisture and smooths fine lines while keeping your skin calm and safe from irritation.
Which ingredients make this serum a good fit for combination skin?
This serum is a great fit for combination skin because it includes niacinamide to control oily shine and multiple peptides like copper tripeptide-1 to smooth texture and hydrate dry areas. These ingredients work well together to keep your skin balanced and plump without causing irritation.
What does Hyaluronic Acid do for combination skin?
Hyaluronic acid is a great fit for combination skin because it quenches dry areas with a boost of hydration while keeping oily zones balanced. Regular use helps smooth out fine lines and makes your skin feel soft and plump without causing irritation.
Dermatology and Therapy, 2021Journal of Drugs in Dermatology, 2011
What do Peptides do for combination skin?
Peptides help combination skin by keeping it smooth, supporting firmness, and boosting hydration. They also help reduce the appearance of lines and encourage skin repair, though absorption depends on the formula.
International Journal of Molecular Sciences, 2025Food & Function, 2019
Where does this serum go in a skincare routine for combination skin?
This serum goes in the evening routine after cleansing and before moisturizing, though some serums can also be used in the morning. This routine step helps deliver active ingredients effectively while keeping your skin calm and safe from sun exposure.
Can I use this serum with retinol, and in what order?
Yes, you can use this serum with retinol, applying this treatment first and following with your retinol. Using a moisturizing treatment with barrier-enhancing ingredients helps reduce irritation and supports your skin while using strong active ingredients.
How often should I use this serum?
You can use this serum in the evening as part of your routine, and some formulas may also be used in the morning or twice a day. This gentle product is unlikely to cause irritation and helps keep combination skin smooth and balanced.
Can this serum clog pores, cause breakouts or purging for combination skin?
This serum is unlikely to cause breakouts or clog pores on combination skin, as reviewers rarely report this issue and the formula contains no harsh ingredients. It helps control oily shine while keeping your skin calm and smooth.
Can I use this serum around the eyes or on my body?
You can safely use this serum around your eyes and on your body because its gentle formula is well tolerated. Because the skin around the eyes is much thinner than on the body, it benefits greatly from the soothing and hydrating ingredients found in this treatment.
Surgical and Radiologic Anatomy, 2002Skin Research and Technology, 2026
Is this serum fragrance-free and alcohol-free?
Yes, it has no fragrance and no drying alcohol.
What the research says
Topical application of 0.1% hyaluronic acid formulations of different molecular weights led to significant improvements in skin hydration and elasticity, with low-molecular-weight formulations also significantly reducing wrinkle depth in seventy-six female subjects compared to a vehicle control.
Journal of Drugs in Dermatology, 2011Topical application of hyaluronic acid in conjunction with free gingival graft significantly reduced donor site postoperative pain until day 7 compared to normal saline, with no significant differences in graft dimensions or patient satisfaction.
Clinical Oral Investigations, 2022Treatment with a hyaluronic acid-containing mouth rinse or topical gel led to significant lesion reduction, pain relief, and normalization of lesion color in adult patients with minor recurrent aphthous stomatitis, with the gel formulation showing an earlier healing onset at 3 days.
BMC Oral Health, 2019Topical 2% N-acetyl glucosamine reduced facial hyperpigmentation in an 8-week split-face clinical test, with an even greater effect observed when combined with 4% niacinamide.
Journal of Cosmetic Dermatology, 2007N-acetyl-glucosamine-loaded nanostructured lipid carriers successfully delivered the hydrophilic agent through the skin and reduced melanin distribution in healthy volunteers.
Advanced Pharmaceutical Bulletin, 2016Topical cosmetic products containing hyaluronic acid, N-acetyl glucosamine, and gamma-amino butyric acid improved skin hydration by 24.28% to 33.60%, elasticity by 11.98%, and skin lightening by 5.26% over 2 months in 20 female participants.
Journal of Cosmetic and Laser Therapy, 2019Topical post-laser application of human adipocyte-derived mesenchymal stem cell media combined with niacinamide significantly improved wrinkle index, melanin index, patient satisfaction, and investigator esthetic improvement scores compared to vehicle cream in patients with aging skin.
Journal of Cosmetic Dermatology, 2021Topical nicotinamide prevented solar-simulated UV-induced immunosuppression in healthy volunteers, and men experienced immunosuppression at solar-simulated UV doses three times lower than those required for women.
The Journal of Investigative Dermatology, 2008Topical 5% niacinamide applied twice daily for 12 weeks reduced fine lines and wrinkles, hyperpigmented spots, red blotchiness, and skin sallowness, and improved skin elasticity compared to vehicle control in 50 female white subjects with facial photoaging.
Dermatologic Surgery, 2005Topical gel containing chitosan, 0.2% chlorhexidine, allantoin and dexpanthenol did not improve postoperative comfort regarding swelling and pain, but improved the wound's aesthetic appearance following impacted lower third molar extraction compared to no gel.
Medicina Oral, Patologia Oral Y Cirugia Bucal, 2016A topical gel containing chitosan, chlorhexidine, allantoin, and dexpanthenol significantly reduced postoperative pain, trismus, swelling, and analgesic consumption, while improving wound healing after third molar surgery compared to a placebo.
Medicina Oral, Patologia Oral Y Cirugia Bucal, 2020An overnight patch containing Allium cepa extract and allantoin safely promotes scar healing after dermatologic surgery, resulting in significantly greater reductions in observer- and patient-assessed POSAS scores compared to no treatment.
Aesthetic Plastic Surgery, 2018
Ingredients
Water, Dipropylene Glycol, Glycerin, Pentylene Glycol, 1,2-Hexanediol, Niacinamide, Ammonium Acryloyldimethyltaurate Vp Copolymer, Polyacrylate Crosspolymer-6, Butylene Glycol, Xanthan Gum, Ethylhexylglycerin, Adenosine, Polyquaternium-51, Disodium Edta, Citric Acid, Caprylyl Glycol, Betaine, T-Butyl Alcohol, Sodium Pca, Sodium Lactate, Acetyl Hexapeptide-8, Copper Tripeptide-1, Pca, Sh-Polypeptide-121, Serine, Alanine, Allantoin, Sodium Hyaluronate, Acetyl Glucosamine, Glycine, Glutamic Acid, Lysine Hcl, Threonine, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Arginine, Tocopherol, Oligopeptide-68, Proline, Dextran, Palmitoyl Tripeptide-8, Glycine Soja Oil Soybean Oil, Hydrogenated Lecithin, Potassium Sorbate, Sodium Oleate
Behind this fit score
Lovi calculates every fit score from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.
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Co-founder, Medical Director
Cosmetic chemist, cosmetologist, aesthetic products developer
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Co-founder, CEO and CTO
PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex
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Dr. Sofía Perea Pérez, MD, MSc
Medical Board
Aesthetic medicine practitioner, MSc in Longevity and Anti-Aging Medicine
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Medical Board
Specialist dermatologist, MBBS, MD, IFAAD
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Medical Board
Cosmetic chemist, SCS, IFSCC member
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Medical Board, Medical Advisor
Dermatology MD
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Elina Nazarenko, MD
Medical Board
Dermatology and diagnostic consultant
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Victoria Derkova, MS
Medical Board
Cosmetic chemist, cosmetic development technologist
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