Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment — 15% Brightening Complex, THD Vitamin C gel-cream for dark spots

Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment is an intensive brightening gel-cream formulated with a 15% Brightening Complex plus THD ascorbate Vitamin C to visibly reduce the appearance of dark spots, discoloration and post-acne marks.

This concentrated topical treatment blends multiple proven brightening actives into a lightweight gel-cream that absorbs quickly and layers easily under moisturizer and SPF. The formula pairs niacinamide, tranexamic acid, kojic acid, alpha arbutin and a pentapeptide in a 15% Brightening Complex, while THD ascorbate supplies a stable, high-performance vitamin C derivative to promote a more even-looking complexion. Designed for targeted application, the product aims to minimize the look of uneven tone caused by sun exposure, aging and acne scarring without heavy residue.

How does this treatment target dark spots and uneven tone?

The product combines several brightening ingredients that work through complementary mechanisms—niacinamide helps regulate pigment transfer, tranexamic acid addresses discoloration pathways, and kojic acid and alpha arbutin inhibit excess melanin production. THD ascorbate acts as a stable vitamin C source to support brightness and antioxidant protection, while the pentapeptide helps overall skin appearance.

• 15% Brightening Complex: niacinamide, tranexamic acid, kojic acid, alpha arbutin, pentapeptide
• THD ascorbate vitamin C for stability and visible radiance
• Gel-cream texture for fast absorption and layering
• Targets sun, age- and acne-related discoloration

How should I use it in my skincare routine?

Apply a thin layer to clean, dry skin once or twice daily where discoloration appears, following cleanser and toner and before heavier creams. Because it contains active brightening ingredients, always follow with broad-spectrum SPF in the morning to protect treated areas and support results. Patch-test new actives if you have sensitive skin and introduce gradually.

• Use after cleansing and before moisturizer
• Apply sunscreen during daytime use
• Introduce slowly if you’re new to potent brighteners
• Suitable for spot treatment or overall brightening

What skin types and concerns will benefit from this formula?

The lightweight gel-cream suits most skin types, including combination and oily skin, because of its non-greasy finish. It’s formulated for visible concerns like brown spots, post-acne marks and uneven tone rather than generalized hydration; those with very dry or reactive skin may prefer to layer it under a richer moisturizer or use less frequently.

• Addresses dark spots, hyperpigmentation and post-acne marks
• Lightweight texture works well for normal to oily skin
• Can be layered under moisturizers for dry skin
• Not a replacement for daily sunscreen

How quickly can I expect to see visible improvement?

Results vary by user and severity of discoloration; many users notice gradual improvements in tone and clarity over several weeks of consistent use. Because the formula targets pigment pathways, ongoing use plus sun protection usually yields the best visible change. For faster progress, combine with a dermatologist-recommended routine if you have deep or stubborn hyperpigmentation.

• Visible changes typically develop with regular use over weeks
• Sunscreen accelerates and preserves results
• Combination treatments may be advised for severe discoloration
• Consistency is important for sustained improvement

Who is this for: Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment is aimed at people seeking a targeted, high-performance brightening serum alternative that addresses sun spots, age spots and post-acne marks. It suits those comfortable using active ingredients—especially niacinamide and stable vitamin C derivatives—and who will commit to daily protection from UV exposure. If you want a lightweight, fast-absorbing product that layers easily into a morning or evening regimen to promote a more even-looking complexion, this treatment is a practical choice.

Ingredients

Water/Aqua/Eau, 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 (Shea) Butter, Tetrahexyldecyl Ascorbate, Kojic Acid, Resveratrol, Tocopheryl Acetate, Diethylhexyl Syringylidenemalonate, Hydrangea Arborescens Root Extract, Morus Alba Root Extract, Scutellaria Lateriflora Extract, Hydrolyzed Vegetable 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.