Vitamin C Serum
What it's good for
Key actives from our research database. Click any to read the full evidence dossier.
A Korean-approved anti-wrinkle ingredient that encourages collagen production for a smoother, firmer look.
Good for: Anti-aging
Calms irritation and adds light hydration. The classic for sunburned or reactive skin.
Good for: Anti-inflammatory, Hydrating
Also called "cica," it calms redness, repairs the skin barrier, and speeds up recovery. The go-to for irritated or reactive skin.
Good for: Anti-inflammatory, Barrier repair
Boosts the effectiveness of vitamin C and vitamin E when layered together. The reason a good morning antioxidant serum stays potent through the day.
Good for: Antioxidant
A workhorse hydrator that pulls water into your skin. In nearly every good moisturizer for a reason.
Good for: Hydrating
A calming K-beauty botanical that's also antibacterial, so it pairs well for acne-prone, sensitive skin.
Good for: Anti-inflammatory, Anti-acne
A pure hydrator that holds water in your skin. Makes skin look plumper and smoother almost immediately.
Good for: Hydrating
A multitasker that calms redness, evens out skin tone, and helps oily skin balance out. One of the safest do-a-little-of-everything ingredients.
Good for: Brightening, Barrier repair, Anti-inflammatory
Pro-vitamin B5. Deeply hydrates and helps repair the skin barrier, calming dry or compromised skin.
Good for: Hydrating, Barrier repair
Brightens dull skin and helps fade dark spots. Also defends against everyday UV and pollution damage when worn under sunscreen.
Good for: Brightening, Antioxidant
A workhorse antioxidant that defends your skin from daily oxidative damage. Pairs especially well with vitamin C, and it's in nearly every good moisturizer for a reason.
Good for: Antioxidant
Evidence behind the ingredients
Real citations from our research database, one per tracked active in this product. Click any ingredient name to read its full evidence dossier.
A Korean-approved anti-wrinkle ingredient that encourages collagen production for a smoother, firmer look.
Yang HJ et al., Two-phase delivery using a horse oil and adenosine-loaded dissolving microneedle patch for skin barrier restoration, moisturization, and wrinkle improvement, Journal of Cosmetic Dermatology 2019;18(3):936-943 — Korean clinical study (n=20): adenosine microneedle patches improved elasticity, hydration, dermal density, wrinkles
Kang G et al., Adenosine-loaded dissolving microneedle patches to improve skin wrinkles, dermal density, elasticity and hydration, International Journal of Cosmetic Science 2018;40(2):199-206 — Korean-authored; adenosine microneedle patches matched or exceeded adenosine cream for multiple endpoints
Kim MY et al., Effect of adenosine on melanogenesis in B16 cells and zebrafish, Annals of Dermatology 2014;26(2):209-13 — adenosine suppresses pigmentation via negative regulation of tyrosinase in cellular and zebrafish models
Calms irritation and adds light hydration. The classic for sunburned or reactive skin.
Huang YN et al., Effects of Aloe vera on Burn Injuries: A Systematic Review and Meta-Analysis of Randomized Controlled Trials, Journal of Burn Care & Research 2024;45(6):1536-1545 — topical aloe vera reduced burn wound-healing time
Tungkasamit T et al., Reduction in severity of radiation-induced dermatitis in head and neck cancer patients treated with topical aloe vera gel: A randomized multicenter double-blind placebo-controlled trial, European Journal of Oncology Nursing 2022;59:102164 — aloe vera reduced severity of moderate-to-severe radiation dermatitis
Sharma S et al., Second-Degree Burns and Aloe Vera: A Meta-analysis and Systematic Review, Advances in Skin & Wound Care 2022;35(11):1-9 — topical aloe vera shortened time to healing for second-degree burns
Also called "cica," it calms redness, repairs the skin barrier, and speeds up recovery. The go-to for irritated or reactive skin.
Hur N et al., A Randomized, Double-Blind, Placebo-Controlled Trial Assessing the Effects of Oral Centella asiatica Extract on Skin Aging-Related Parameters in Middle-Aged Korean Women, Nutrients 2026
Borowicz KK et al., Geroprotective Potential of Centella asiatica: Modulation of Cellular Aging, Nutrients 2026
Witkowska K et al., Topical Application of Centella asiatica in Wound Healing: Recent Insights into Mechanisms and Clinical Efficacy, Pharmaceutics 2024;16(10):1252 — modern hydrogel and nanostructured Centella delivery systems accelerate wound healing across wound types
+−8 more ingredients
Boosts the effectiveness of vitamin C and vitamin E when layered together. The reason a good morning antioxidant serum stays potent through the day.
Kim JH et al., Fractional microneedle radiofrequency with the application of vitamin C, E, and ferulic acid serum for neck skin rejuvenation: a prospective, double-blinded, split-neck, placebo-controlled trial, Journal of Dermatological Treatment 2025;36(1):2504655 — CE+ferulic serum + microneedle RF produced superior clinical and histologic neck rejuvenation vs RF alone
Roux M et al., Ferulic Acid Use for Skin Applications: A Systematic Review, Journal of Clinical and Aesthetic Dermatology 2025;18(5):38-42 — SR of 18 human studies; topical ferulic acid improved erythema, pigmentation, hydration, elasticity, texture
Wang X et al., Ferulic Acid in the Treatment of Papulopustular Rosacea: A Randomized Controlled Study, Journal of Cosmetic Dermatology 2025;24(1):e16611 — topical ferulic acid solution twice daily improved papulopustular rosacea
A workhorse hydrator that pulls water into your skin. In nearly every good moisturizer for a reason.
Danby SG et al., Different types of emollient cream exhibit diverse physiological effects on the skin barrier in adults with atopic dermatitis, Clinical and Experimental Dermatology 2022;47(6):1154-1164 — glycerol+urea emollient delivered superior barrier-strengthening and irritant protection
Youssef R et al., Glycerol 85% efficacy on atopic skin and its microbiome: a randomized controlled trial, Journal of Dermatological Treatment 2021;32(7):730-736 — topical glycerol 85% RCT on atopic skin
Evans NJ et al., Human axillary skin condition is improved following incorporation of glycerol into the stratum corneum from an antiperspirant formulation, Archives of Dermatological Research 2017;309(9):739-748 — 4% glycerol penetrated axillary SC, reduced irritation, improved hydration
A calming K-beauty botanical that's also antibacterial, so it pairs well for acne-prone, sensitive skin.
Song Z et al., Inhibition of LPS-Induced Skin Inflammatory Response and Barrier Damage via MAPK/NF-kB Signaling Pathway by Houttuynia cordata Thunb Fermentation Broth, Foods 2024
Kwon N et al., Protective Effects of Fermented Houttuynia cordata Against UVA and H2O2-Induced Oxidative Stress in Human Skin Keratinocytes, Applied Biochemistry and Biotechnology 2023;195(5):3027-3046 — Korean-authored; fermented H. cordata showed antioxidant and anti-inflammatory protection against UVA/H2O2 stress
Rafiq S et al., Pharmacological Effects of Houttuynia cordata Thunb (H. cordata): A Comprehensive Review, Pharmaceuticals (Basel) 2022
A pure hydrator that holds water in your skin. Makes skin look plumper and smoother almost immediately.
Karabat MU, Tuncer MC. Effects of hyaluronic acid on skin at the cellular level: a systematic review. Rev Assoc Med Bras. 2025;71(8):e20250208. — Systematic review of 45 studies found low-molecular-weight HA stimulates keratinocyte proliferation and migration while high-molecular-weight HA drives skin hydration, supporting topical HA as an effective skin-hydrating and barrier-supporting ingredient.
Bravo B et al., Benefits of topical hyaluronic acid for skin quality and signs of skin aging: From literature review to clinical evidence, Dermatology and Therapy 2022;12(12):2657-2680 — HA-based cosmeceuticals reliably improve hydration and signs of skin aging
Lee SG et al., Hyaluronan Oligosaccharides Improve Rosacea-Like Phenotype through Anti-Inflammatory and Epidermal Barrier-Improving Effects, Annals of Dermatology 2020
A multitasker that calms redness, evens out skin tone, and helps oily skin balance out. One of the safest do-a-little-of-everything ingredients.
Moro F et al., Skin Cancer Prevention and Antiaging: Role of Nicotinamide, International Journal of Molecular Sciences 2026
Passeron T et al., An Investigator-Blinded, Randomized Trial of a Broad-Spectrum Sunscreen Containing Sclareolide and Niacinamide, Dermatology and Therapy (Heidelberg) 2026
Vergilio MM et al., Topical Formulation with Niacinamide Combined with 5 MHz Ultrasound for Improving Skin Ageing, Current Medicinal Chemistry 2025
Pro-vitamin B5. Deeply hydrates and helps repair the skin barrier, calming dry or compromised skin.
Gao Y et al., Evaluation of the Efficacy and Safety of a Panthenol-Enriched Mask for Skin Barrier Recovery After Facial Laser Treatment, Journal of Cosmetic Dermatology 2025;24(7):e70223 — double-blind RCT (n=60): panthenol mask decreased erythema, enhanced hydration, repaired barrier vs saline
Cho YS et al., Use of Dexpanthenol for Atopic Dermatitis-Benefits and Recommendations Based on Current Evidence, Journal of Clinical Medicine 2022;11(14):3943 — Korean-authored review; dexpanthenol improves barrier and reduces severity in mild-to-moderate AD
Heise R et al., Accelerated wound healing with a dexpanthenol-containing ointment after fractional ablative CO2 laser resurfacing of photo-damaged skin in a randomized prospective clinical trial, Cutaneous and Ocular Toxicology 2019;38(3):274-278 — RCT: dexpanthenol significantly faster wound closure vs petroleum jelly post-laser
Brightens dull skin and helps fade dark spots. Also defends against everyday UV and pollution damage when worn under sunscreen.
Krutmann J et al. PINGing Sunshine: A Review of the Evidence for Adding Non-Filtering Photoprotective Ingredients to Sunscreens. Photodermatol Photoimmunol Photomed. 2025;41(6). — Review of Photoprotective INGredients (PINGs); L-ascorbic acid (vitamin C) identified as a top-ranked PING demonstrating efficacy across multiple photodamage endpoints.
Pullar JM et al., The roles of vitamin C in skin health, Nutrients 2017;9(8):866 — concluded topical efficacy "poorly understood"; supports dietary vitamin C
Lee JH et al., Effects of VitabridC12 on Skin Inflammation, Annals of Dermatology 2017
A workhorse antioxidant that defends your skin from daily oxidative damage. Pairs especially well with vitamin C, and it's in nearly every good moisturizer for a reason.
Neves JR et al., Efficacy of a topical serum containing L-ascorbic acid, neohesperidin, pycnogenol, tocopherol, and hyaluronic acid in relation to skin aging signs, Journal of Cosmetic Dermatology 2022;21(10):4462-4469 — tocopherol-containing antioxidant serum reduced pollution-induced damage and improved aging signs
Warshaw EM et al., Patch Testing With Tocopherol and Tocopherol Acetate: The North American Contact Dermatitis Group Experience, 2001 to 2016, Dermatitis 2021;32(5):308-318 — 15-year NACDG data: positive patch-test reactions to tocopherol rare given widespread cosmetic use
Lin FH et al., Ferulic acid stabilizes a solution of vitamins C and E and doubles its photoprotection of skin, Journal of Investigative Dermatology 2005;125(4):826-832 — ferulic acid + vit C + vit E combo doubled photoprotection vs C+E alone (cross-listed; same paper cited for Ferulic Acid and Vit C)
Sources: 10 clinical journals and regulatory databases across the US, EU, Korea, Japan, and China. Every entry points to a specific document. See methodology for the full list and what each outcome label means.
Layering conflicts
Ingredients in this product that can react with common actives. Avoid stacking unless noted.
- Benzoyl Peroxidemedium
Benzoyl peroxide breaks down vitamin C, making both less effective. Use one in the morning and the other at night.
- Retinollow
Vitamin C and retinol work best at different pH levels. Use vitamin C in the morning and retinol at night.
Similar comparisons
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