Sunday Riley C.E.O. 15% Vitamin C Brightening Serum for combination skin
Tetrahexyldecyl Ascorbate Ascorbic Acid
Squalane
Phytosterols
Glycolic Acid
Saccharide IsomerateHigh
- HighCombination Skin Fit
- HighEffectiveness
- HighSafety
A great choice for combination skin; a few serums fit it even better.
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 tetrahexyldecyl ascorbate and glycolic acid to effectively brighten and even your skin tone, addressing oily shine with mild exfoliation and antioxidant support.
- The inclusion of tocopherol further enhances barrier repair, complementing the brightening effects for your skin type.
- The formulation is safe for your combination skin, containing no harsh or prohibited ingredients that would cause irritation.
How to apply
- Use your serum as part of your PM routine. Start using it 3 times a week and move to daily use if your skin likes it.
- Apply the serum after cleansing and toner, and right before your moisturizer.
- Gently press 2-3 drops of the serum into your skin and wait a minute ⏳for it to soak in.
- Apply the serum on clean and dry skin since your skin is not sensitive.
- Always do a patch test before using the serum for the first time, and avoid the eye area .
People Say
★4.6Overall rating based on 4.5k+ reviewsBased on a very large amount of data, users with dull, dry, and sensitive skin frequently praise this serum for its rich, creamy texture that hydrates while delivering a visible "lit-from-within" glow. Many report significant fading of acne scars and hyperpigmentation without the irritation common to other Vitamin C products, though a minority of users found the high price point unjustifiable for the results achieved.
Highlights
Brightens and evens tone Mostly Mentioned
- “leaves complexion glowing”
- “faded my acne scars”
- “skin looks noticeably brighter”
- “got rid of dullness”
Hydrating creamy texture Mostly Mentioned
- “sinks in immediately”
- “non-greasy but moisturizing”
- “feels like a lotion”
- “plumps my skin”
High price point Mostly Mentioned
- “way too expensive”
- “hard to justify the price”
- “luxury splurge only”
- “wallet hurts buying this”
Gentle on sensitive skin Often Mentioned
- “zero irritation”
- “gentle enough for daily use”
- “no tingling sensation”
Pleasant citrus scent Often Mentioned
- “smells like fresh oranges”
- “delicious citrus scent”
- “smells spa-like”
- “uplifting fragrance”
Packaging issues Sometimes Noted
- “pump stopped working”
- “can't get the last bit out”
- “bottle design is wasteful”
- “have to unscrew to use”
Caused breakouts Rarely Noted
- “gave me tiny white bumps”
- “caused cystic acne”
- “clogged my pores”
- “broke me out immediately”
Lack of results Rarely Noted
- “didn't see a difference”
- “dark spots didn't fade”
- “glorified moisturizer”
- “expected more for the money”
Sources: lovi.care, dermstore.com, spacenk.com, sephora.com, ulta.com, cultbeauty.co.uk, and more
Questions and answers
What makes Sunday Riley C.E.O. 15% Vitamin C Brightening Serum a great fit for combination skin?
This serum is a great fit because it brightens and evens your skin tone while gently managing oily shine with mild exfoliation and antioxidants. It also helps repair the skin barrier safely without causing irritation.
Which ingredients make this serum a good fit for combination skin?
This serum is a great fit for your combination skin because it uses tetrahexyldecyl ascorbate and glycolic acid to brighten your skin tone and manage oily shine with gentle exfoliation. It also includes tocopherol to help repair your skin barrier safely without causing irritation.
What does Tetrahexyldecyl Ascorbate do for combination skin?
Tetrahexyldecyl Ascorbate helps brighten combination skin and protect it from daily damage while supporting collagen production. It is unlikely to cause irritation and works well to keep skin smooth and firm.
Journal of Cosmetic Dermatology, 2012International Journal of Molecular Sciences, 2021
What does Squalane do for combination skin?
Squalane helps keep combination skin soft and smooth by locking in moisture without feeling heavy or greasy. It supports the skin barrier and provides lightweight hydration that works well for both dry and oily areas.
Skin Health and Disease, 2024Journal of Nanobiotechnology, 2025
Where does this serum go in a skincare routine for combination skin?
This treatment serum goes in the evening routine for combination skin. Using it at night helps avoid extra sensitivity around sun exposure while brightening skin tone and keeping oily shine under control.
Journal of Drugs in Dermatology, 2023Journal of Cosmetic and Laser Therapy, 2012
Can I use this serum with retinol, and in what order?
You can use this serum with retinol, but it is best to apply them on alternate nights or use vitamin C in the morning and retinol at night to avoid overwhelming your skin. Using both active treatments at the exact same time may lead to extra dryness or irritation.
How often should I use this serum?
This serum is a great fit for your combination skin and is applied in the evening. You can safely start using it once a week, and then carefully use it more often if your skin tolerates it well.
Can this serum clog pores, cause breakouts or purging for combination skin?
This serum is unlikely to cause breakouts for combination skin because it is formulated with safe ingredients that avoid harsh additives and heavy pore-clogging elements. It also helps manage oily shine with mild exfoliation while supporting your skin barrier.
Is this serum fragrance-free and alcohol-free?
It has no drying alcohol and contains fragrance (limonene and linalool).
What the research says
A 3-in-1 anti-aging topical night serum-in-oil applied once daily decreased wrinkles by 11%, increased skin firmness by 8%, reduced redness by 70%, and improved overall skin quality and complexion in 103 female subjects over 28 to 84 days compared to baseline.
Journal of Cosmetic Dermatology, 2019A topical serum containing vitamin C, vitamin E, and raspberry leaf cell culture extract improved skin color, elasticity, radiance, smoothness, scaliness, and wrinkles compared to the untreated contralateral side in fifty female volunteers.
Journal of Cosmetic Dermatology, 2020Topical application of 5% vitamin C cream significantly improved global clinical scores, increased skin microrelief density, and induced elastic tissue repair in photoaged skin compared to excipient control in healthy female volunteers.
Experimental Dermatology, 2003Ascorbic acid 2-glucoside gel significantly reduced gingival melanin pigmentation after 4 weeks compared to placebo in 73 subjects with symmetric pigmentation.
Journal of Periodontology, 2009Topical application of VC-IP cream twice daily for 8 weeks reduces periorbital wrinkles in female subjects compared to a placebo cream.
Journal of Cosmetic Dermatology, 2022Squalane at 0.005-0.015% counteracts UVA-induced oxidative stress, inflammation, and collagen metabolism inhibition while stimulating fibroblast migration in human dermal fibroblasts.
Molecules, 2025Plant-derived squalane protected human dermal fibroblasts against UVA-induced damage by counteracting ROS formation, suppressing apoptosis-related proteins p53, caspase-3, caspase-9, and PARP, and restoring the pro-survival p-Akt/mTOR pathway.
Antioxidants, 2025Topical application of soybean phytosterols improves skin barrier recovery compared to a vehicle control in human volunteers with tape-stripped skin.
Journal of Cosmetic Science, 2008Topical application of a formulation containing niacinamide and soy phytosterols recovered about 95% of skin barrier integrity eight days after tape stripping in vivo.
Current Drug Delivery, 2016Topical application of phytosterols and ceramides on healthy skin blocked the UV-induced down-regulation of COL1A1 and COL1A2 expression, while all four tested preparations inhibited the UV-induced up-regulation of MMP-1.
Der Hautarzt; Zeitschrift Fur Dermatologie, Venerologie, und Verwandte Gebiete, 2008Repeated short-contact 70% glycolic acid peels provided superior results in atrophic acne scars compared to daily low-strength glycolic acid cream or placebo in 58 women over 24 weeks.
International Journal of Dermatology, 2000Serial glycolic acid peels combined with a modified Kligman formula significantly reduced facial PIH severity in Indian patients compared to the modified Kligman formula alone.
Dermatologic Surgery, 2017A combination cream of stimu-tex AS and saccharide isomerate reduced erythema, increased skin capacitance, and reduced transepidermal water loss compared to placebo in 20 subjects after fractional CO2 laser procedure without causing serious adverse events.
Lasers in Medical Science, 2025A novel moisturizer containing saccharide isomerate accelerates skin barrier recovery, improves hydration, reduces erythema, and alleviates discomfort compared to a control moisturizer following intense pulsed light treatment in subjects with skin aging.
The Journal of Dermatological Treatment, 2025Formulations containing saccharide isomerate significantly improved transepidermal water loss, sebum secretion, and scalp flaking compared to a placebo formulation in an adult Chinese population affected by dandruff scalp.
Journal of Cosmetic Dermatology, 2023
Ingredients
Water, Tetrahexyldecyl Ascorbate, Squalane, Peg-8 Beeswax, Hydrogenated Polydecene, Polyglyceryl-6 Distearate, Ppg-12 Smdi Copolymer, Phenoxyethanol, Acetamidoethoxyethanol, Jojoba Esters, Sodium Acrylate Sodium Acryloyldimethyl Taurate Copolymer, Glycine Soja Sterols, Tocopherol, Glycolic Acid, Caprylyl Glycol, Sodium Phytate, Citrus Aurantium Dulcis Oil, Chlorphenesin, Alba Cera, Glycerin, Isosqualane, C30 Hydrocarbons, Saccharide Isomerate, Limonene, Linalool
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
How does it fit your skin?
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