COSRX The 6 Peptide Skin Booster Serum for skin with dark spots
Sodium Hyaluronate
Peptides
N-Acetyl Glucosamine
Niacinamide
AllantoinHigh
- HighNormal Skin Fit
- HighEffectiveness
- ExcellentSafety
A great choice for skin with dark spots; a few moisturizers fit it even better.
This fit is calculated for the concerns frequently associated with dark spots: hyperpigmentation, sun spots, and uneven skin tone. 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 normal skin, this serum utilizes niacinamide and adenosine to provide antioxidant activity and support barrier repair, while peptides like acetyl hexapeptide-8 and copper tripeptide-1 hydrate and visibly reduce fine lines.
- The inclusion of tocopherol and allantoin ensures a gentle experience, making it safe for your normal skin without irritation.
- This formulation is safe for your skin, as it contains soothing ingredients and lacks harsh or prohibited substances.
How to apply
- Could be used as part of your AM and PM routine. Start using it 3 times a week and move to daily use if your skin likes it.
- Apply this moisturizer after your cleanser and toner, right before your morning SPF.
- Gently press a small amount of the moisturizer into your skin. Avoid rubbing it too hard so it absorbs nicely.
- For the best moisture, you can apply it when your skin is slightly damp. This helps your skin stay soft and happy.
- Remember to avoid the eye area when applying. Always 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 skin with dark spots?
This serum is a great fit for skin with dark spots because it contains niacinamide, which helps reduce dark spots and increase skin lightness. It also includes soothing ingredients like allantoin and peptides to keep your skin calm and smooth without irritation.
Which ingredients make this serum a good fit for skin with dark spots?
Niacinamide is the key ingredient that makes this serum a great fit for dark spots, as it helps decrease hyperpigmentation and brighten skin. Additionally, the formula includes sodium hyaluronate, peptides, and allantoin to hydrate, smooth, and keep your skin calm.
The British Journal of Dermatology, 2002American Journal of Clinical Dermatology, 2013
What does Hyaluronic Acid do for skin with dark spots?
Hyaluronic acid is unlikely to directly fade dark spots, but it helps keep dry and uneven skin plump and deeply hydrated. To effectively target dark spots, this type of skin needs brightening ingredients like vitamin C or niacinamide alongside your hydrator.
What do Peptides do for skin with dark spots?
Peptides help target dark spots by improving skin tone and reducing hyperpigmentation. Formulas combining peptides with antioxidants and brightening ingredients may provide additional support for a clearer, more even complexion.
Dermatology and Therapy, 2025Journal of Drugs in Dermatology, 2025
Where does this serum go in a skincare routine for skin with dark spots?
This treatment serum goes in the evening routine after cleansing and before moisturizing, keeping things simple and safe around sun exposure. This timing works well because evening application avoids any daytime interaction with UV light.
Can I use this serum with retinol, and in what order?
You can use this serum with retinol by applying the serum first to keep your skin calm and hydrated, followed by your retinol. This combination helps smooth the skin while keeping dryness and irritation unlikely.
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. Daily application helps keep your skin hydrated and smooth while supporting your skin barrier.
Journal of Cosmetic Dermatology, 2020Health Science Reports, 2021
Can this serum clog pores, cause breakouts or purging for skin with dark spots?
This serum is unlikely to clog pores or cause breakouts for skin with dark spots, as reviewers rarely report breakouts and the formula avoids heavy, pore-blocking ingredients. It uses gentle, soothing components that help keep skin calm and balanced during daily use.
Can I use this serum around the eyes or on my body?
You can safely use this moisturizing treatment around the eyes and on the body because its gentle formula includes soothing ingredients like allantoin and lacks harsh substances. Regular application of these types of hydrating and smoothing ingredients helps improve skin texture and reduce lines in delicate areas without irritation.
Surgical and Radiologic Anatomy, 2002European Journal of Pharmaceutics and Biopharmaceutics, 2014
Is this serum fragrance-free and alcohol-free?
Yes, it has no fragrance and no drying alcohol.
What the research says
Argireline treatment twice daily for 4 weeks produced a significant anti-wrinkle effect with 48.9% total efficacy and decreased skin roughness in Chinese subjects compared with 0% efficacy and no decrease in roughness in the placebo group.
American Journal of Clinical Dermatology, 2013Adenosine-loaded dissolving microneedle patches showed similar or better efficacy on skin wrinkles, dermal density, elasticity, and hydration compared to adenosine cream in 22 female subjects.
International Journal of Cosmetic Science, 2018Treatment with cross-linked hyaluronic acid-based microneedle patches combined with acetyl hexapeptide-8 or epidermal growth factor significantly improved wrinkles and skin hydration compared to the patch alone in Korean females over 29 days.
Annals of Dermatology, 2019Niacinamide significantly decreased hyperpigmentation and increased skin lightness compared with vehicle alone after 4 weeks of use in women by inhibiting melanosome transfer.
The British Journal of Dermatology, 2002Topical 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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