Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment for oily skin
Niacinamide
Tetrahexyldecyl Ascorbate
Tranexamic Acid
Alpha Arbutin
Kojic AcidAverage
- HighOily Skin Fit
- AverageEffectiveness
- HighSafety
Works for oily skin; other serums fit it better.
This fit is calculated for the concerns frequently associated with oily skin: shine, enlarged pores, blackheads, and blemishes. 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
- This product offers moderate benefits for your oily skin, with niacinamide and tranexamic acid helping to regulate sebum and melanogenesis, though it does not directly address oily shine.
- Alpha arbutin and kojic acid contribute to brightening and evening skin tone, providing general skincare advantages that are supportive but not primary for your concerns.
- The formula is safe for your oily skin, as it lacks harsh ingredients and poses no risk of irritation.
How to apply
- Use this serum in your PM routine. Start by applying it 3 times a week and build up to daily use if your skin tolerates it well.
- Apply the serum after cleansing and toning, but right before your moisturizer for the best results.
- Gently press 2-3 drops of the serum into your skin. Let it absorb ⏱ for a minute before applying the next product.
- Apply the serum on clean and dry skin since your skin is not sensitive and you want to target oily shine. This helps control excess oil throughout the night.
- Avoid the delicate eye area and do a patch test before using the serum for the very first time.
People Say
★4.8Overall rating based on 300+ reviewsUsers consistently praise this treatment for its ability to visibly fade post-acne marks and brighten the overall complexion, often noting its lightweight and non-sticky texture. While many see rapid results with general hyperpigmentation, some users report it is less effective on stubborn conditions like melasma and note the high price point.
Highlights
Fades dark spots Mostly Mentioned
- “acne marks faded faster”
- “reduced post-acne scars”
- “dark spots are lighter”
- “cleared up pigmentation”
Brightens complexion Often Mentioned
- “skin looks radiant”
- “immediate glow”
- “more even skin tone”
- “restored brightness”
Elegant texture Sometimes Noted
- “absorbs quickly”
- “leaves satin finish”
- “not sticky or greasy”
- “layers well under makeup”
Gentle formulation Sometimes Noted
- “no stinging or redness”
- “didn't irritate sensitive skin”
- “gentle enough for daily use”
- “hydrating feel”
High price point Sometimes Noted
- “very expensive”
- “pricey for the size”
- “wish it was cheaper”
- “luxury price tag”
Ineffective on melasma Rarely Noted
- “struggles with melasma”
- “didn't touch stubborn patches”
- “melasma didn't fade”
- “no change in deep pigment”
Potential breakouts Rarely Noted
- “caused small bumps”
- “ingredients might clog pores”
- “broke me out slightly”
- “too heavy for oily skin”
Slow results Rarely Noted
- “takes weeks to work”
- “didn't see immediate change”
- “requires patience”
- “slow progress on old scars”
Sources: lovi.care, kohls.com, dermstore.com, lovelyskin.com, youtube.com, peterthomasroth.com, and more
Questions and answers
How well does Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment work for oily skin?
This treatment works moderately well for oily skin, helping to brighten the tone while regulating oil, though it does not directly manage oily shine. A treatment of this type needs ingredients that control oil and enhance radiance without clogging pores, alongside lightweight hydrators and soothing extracts.
Which ingredients make this treatment a good fit for oily skin?
This treatment works for your oily skin because niacinamide and tranexamic acid help regulate oil production and even out skin tone. To be a top fit for oily skin, a product of this type needs ingredients like niacinamide, zinc PCA, and ferulic acid that control shine and pores, alongside barrier-supporting elements like ceramides and panthenol.
What does Niacinamide do for oily skin?
Niacinamide helps balance oily skin by significantly reducing excess oil production and shine. It is well tolerated and may improve skin texture without clogging pores.
Journal of Cosmetic and Laser Therapy, 2006Antioxidants, 2021
What does Vitamin C do for oily skin?
Vitamin C helps oily skin by fighting oil oxidation and calming redness, making it a useful addition to your daily routine. Formulas with vitamin C keep skin balanced without clogging pores.
International Journal of Cosmetic Science, 2005European Journal of Pharmaceutics and Biopharmaceutics, 2017
Where does this treatment go in a skincare routine for oily skin?
This treatment goes in the evening routine after cleansing and before moisturizing, as this helps keep things simple and safe around sun exposure. Oily skin works best with treatments that also directly target oily shine and excess oil.
Can I use this treatment with retinol, and in what order?
You can use this treatment alongside retinol, applying the treatment first and following with your retinol once it absorbs, though oily skin needs lightweight, oil-balancing ingredients and direct shine control.
How often should I use this treatment?
This treatment works well in your evening routine, where you can start applying it once a week and then use it more often if your skin tolerates it well. Oily skin works best with products that help balance oil and shine while keeping pores clear.
Can this treatment clog pores, cause breakouts or purging for oily skin?
This treatment is unlikely to cause breakouts or clog pores on oily skin since it lacks harsh ingredients and poses no risk of irritation. A product of this type needs lightweight ingredients like niacinamide and salicylic acid to help regulate oil and keep pores clear without feeling heavy.
Is this treatment fragrance-free and alcohol-free?
Yes, it has no fragrance and no drying alcohol. Cetyl alcohol is a fatty alcohol, which soften the skin.
What the research says
Niacinamide 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 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 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, 2022A non-hydroquinone topical formulation (SKNB19) improved hyperpigmentation by 28.5% in patient self-assessment and 27% in independent reviewer assessment compared with 4% hydroquinone in 18 adult subjects, while showing significantly less irritation and better tolerability.
Journal of Cosmetic Science, 2020Encapsulation of alpha arbutin in an optimized ethosomal gel significantly improved skin melanin reduction, moisture content, and elasticity in human volunteers compared to conventional formulations.
Heliyon, 2023Combining a home-based radiofrequency device and arbutin cream reduced mMASI scores by 25.6% and melanin index by 22.8% at 8 weeks compared to baseline in 38 participants.
Journal of Cosmetic Dermatology, 2025A topical formulation containing kojic acid, emblica extract, and glycolic acid demonstrated efficacy parity compared with hydroquinone 4% in multiethnic participants with mild to moderate facial dyschromia.
Cutis, 2010A nanoemulsion containing 1 mg/mL kojic dipalmitate and 5% rosehip oil demonstrated high incorporation efficiency, suitable physicochemical stability, antioxidant and depigmenting efficacy close to 1 mM ascorbic acid, and no cytotoxicity at concentrations from 0.06% to 1% in vitro.
Pharmaceutics, 2023Topical application of iron chelators kojic acid and deferiprone significantly accelerated wound healing in rats compared to control groups, with deferiprone showing superior efficacy due to higher antioxidant and iron chelation abilities.
International Wound Journal, 2013
Why other serums fit oily skin better
A panthenol-enriched mask improved skin hydration, regulated sebum, and reduced redness and TEWL across dry sensitive, oily sensitive, and oily acne skin subgroups with excellent tolerance and no adverse reactions.
Journal of Cosmetic Dermatology, 2024Niacinamide and ferulic acid incorporated in a stable multiple emulsion successfully reduced melanin, sebum, and skin erythema while improving skin elasticity and hydration in human skin compared to a placebo.
BioMed Research International, 2022
Ingredients
Water, Niacinamide, Dimethyl Isosorbide, Isononyl Isononanoate, Tranexamic Acid, Dimethicone, Caprylic Capric Triglyceride, Alpha Arbutin, Cetyl Alcohol, Glyceryl Stearate, Pentylene Glycol, Propanediol, C9-12 Alkane, Citric Acid, Glyceryl Stearate Se, Butyrospermum Parkii Butter Shea Butter, Tetrahexyldecyl Ascorbate, Kojic Acid, Resveratrol, Tocopheryl Acetate, Diethylhexyl Syringylidenemalonate, Hydrangea Arborescens Root Extract, Morus Alba Root Extract, Scutellaria Lateriflora Extract, Hydrolyzed Protein, Silica, Sodium Stearoyl Glutamate, Coco-Caprylate Caprate, Dimethiconol, Glycerin, Sodium Phytate, Potassium Sorbate, Sodium Benzoate, Caprylyl Glycol, Hexylene Glycol, Polysorbate 20, Ceteth-20, Steareth-20, Polyacrylate Crosspolymer-6, Peg-75 Stearate, Titanium Dioxide Ci 77891, Phenoxyethanol
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
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PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex
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Dr. Sofía Perea Pérez, MD, MSc
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Specialist dermatologist, MBBS, MD, IFAAD
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Elina Nazarenko, MD
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Victoria Derkova, MS
Medical Board
Cosmetic chemist, cosmetic development technologist
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