Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment for skin with dark spots
Niacinamide
Tetrahexyldecyl Ascorbate
Tranexamic Acid
Alpha Arbutin
Kojic AcidSuperior
- HighNormal Skin Fit
- HighEffectiveness
- HighSafety
One of the best serums for skin with dark spots.
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
- Excellent suitability for your normal skin is provided by niacinamide and alpha arbutin, which regulate melanogenesis and repair the skin barrier, addressing your pigmentation concerns effectively.
- The inclusion of tranexamic acid further targets discoloration, enhancing the brightening and evening of skin tone.
- The product is safe for your skin, with no risks of irritation due to the absence of prohibited or harsh ingredients.
How to apply
- Apply this serum as part of your PM routine starting 3x/week and build up to daily use if your skin likes it.
- Place the serum after cleansing and toning, but before your moisturizer.
- Gently press 2-3 drops of the serum into your skin and wait a minute for it to absorb.
- Apply the serum on dry skin to help fade pigmentation effectively.
- Avoid the eye area and always use SPF 30+ during the day.
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
What makes Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment one of the best fits for skin with dark spots?
This treatment is one of the best fits because niacinamide and alpha arbutin regulate dark spots and repair the skin barrier, while tranexamic acid further targets discoloration to brighten and even out your skin tone. It is also very safe for your skin, as it avoids harsh or prohibited ingredients that could cause irritation.
Which ingredients make this treatment a good fit for skin with dark spots?
This treatment is a very good fit for dark spots because niacinamide and alpha arbutin help fade dark patches and even out your skin tone. Tranexamic acid, tetrahexyldecyl ascorbate, and kojic acid are also included to further brighten your skin without causing irritation.
What does Niacinamide do for skin with dark spots?
Niacinamide helps fade dark spots and uneven pigmentation by slowing down the transfer of pigment in the skin. It is generally well tolerated and may improve overall skin brightness with consistent use.
What does Vitamin C do for skin with dark spots?
Vitamin C helps fade dark spots and brightens uneven skin tone by slowing down pigment production. Daily use also helps calm redness and protects against further sun damage.
Journal of Cosmetic Dermatology, 2023Dermatologic Surgery, 2005
Where does this treatment go in a skincare routine for skin with dark spots?
This treatment goes in the evening routine after cleansing and before moisturizing. Putting treatments in the evening helps keep things simple and gives extra safety around sun exposure.
Can I use this treatment with retinol, and in what order?
You can use this treatment with retinol by applying this treatment first and following with your retinol once it absorbs, or by using them on alternate nights to keep your skin calm. Niacinamide and alpha arbutin help fade dark spots while supporting your skin barrier, making it easier to pair with active ingredients safely.
How often should I use this treatment?
Use this treatment in the evening, applying it as part of your nighttime routine for safety around sun exposure. It is safe for your skin with no risks of irritation, and helps fade dark spots to make your skin tone more even.
Can this treatment clog pores, cause breakouts or purging for skin with dark spots?
This treatment is unlikely to cause breakouts or clog pores for skin with dark spots because it has no harsh ingredients and is safe for your skin.
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, 2002Encapsulation 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, 2023Topical 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, 2020Combining 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, 2025Polyvinyl pyrrolidone-K90/Eudragit RL100 dissolving microneedle patches loaded with alpha-arbutin and resveratrol enhanced intradermal delivery by approximately 2.6 times compared to cream and slightly decreased the melanin index in human participants without causing skin irritation.
Biomaterials Science, 2023A 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
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.
-
Co-founder, Medical Director
Cosmetic chemist, cosmetologist, aesthetic products developer
-
Co-founder, CEO and CTO
PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex
-
Dr. Sofía Perea Pérez, MD, MSc
Medical Board
Aesthetic medicine practitioner, MSc in Longevity and Anti-Aging Medicine
-
Medical Board
Specialist dermatologist, MBBS, MD, IFAAD
-
Medical Board
Cosmetic chemist, SCS, IFSCC member
-
Medical Board, Medical Advisor
Dermatology MD
-
Elina Nazarenko, MD
Medical Board
Dermatology and diagnostic consultant
-
Victoria Derkova, MS
Medical Board
Cosmetic chemist, cosmetic development technologist
How does it fit your skin?
Scan your face, then any product: Lovi shows how well it fits you and what fits even better.