Peter Thomas Roth

Peter Thomas Roth Potent-C™ Niacinamide Discoloration Treatment.

Q: Is Peter Thomas Roth Potent-C™ Niacinamide Discoloration Treatment worth it?

Mostly yes. 1 of the 2 gurus who reviewed it give it their stamp of approval, for a Guru Score of 76%.

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Serums

About this product

A niacinamide and vitamin C brightening treatment designed to target dark spots, discoloration, and hyperpigmentation.

Full 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

Guru Score

76%

Yay

Early verdict · Few reviews so far

What the gurus are saying

This brightening lotion handles dark spots and fresh hyperpigmentation effectively but can't touch stubborn, long-lasting melasma. It layers well with ascorbic acid serums, generally suits most skin types, and may cause mild stinging; follow with moisturizer and sunscreen. At around $60, it's pricey for a treatment with limited effectiveness on stubborn discoloration.

Synthesized from 2 expert reviews · most recent take February 2026

What they liked

Helps with dark spots and post-acne marks
Hydrating formula
Works well layered over ascorbic acid serums

What they flagged

Pricey compared to alternatives
Struggles with stubborn melasma

Type

SerumsDrops & dropper

Key actives

Vitamin C NiacinamideVitamin E

Formula notes

Fragrance-freeNo drying alcohol

Where to buy

Sephora → Ulta → Amazon → Google →

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What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Yay takes Nay takes Mixed takes Hide sponsored

No BS Beauty

89k subs

✓Nay

"I picked up the Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment and this one's multiple times the price. [...] I wish I would have known Good Molecules was coming out with that before I picked this up because I think this was something like 60 bucks. [...] It's got a lotion texture to it so you're going to want to apply it typically in your morning routine, but then apply a moisturizer and sunscreen over it."

All 9 takes from No BS Beauty

Comparing Vitamin C Derivatives 🍊 Best Brightening Vitamin C Serums for Sensitive Skin

"Typically we want it for ascorbic acid low, but for this one if the pH is above five it appears to have the ability to absorb into skin and may have all the important abilities of pure ascorbic acid such as the antioxidant protection from UV rays, increasing collagen production in skin, and brightening benefits, although most of that is just from a small amount of research. So try it and see how your skin works with it."

Best Brightening Products of 2024 - Top Products for Dark Spots, Hyperpigmentation, & Melasma

"This one's going to be the most expensive, so if you're on a budget I would probably start with the most affordable one for you and work your way up. [...] In general these are all great, and if you're looking for brightening of dark spots, sun spots, melasma, hyperpigmentation, post-inflammatory hyperpigmentation, anything like that, some of these are very good."

Can Dr. Idriss Major Fade Hyper Serum Really Fix Hyperpigmentation? Watch This Dark Spot Review!

"The new Peter Thomas Roth Potent-C Niacinamide discoloration correction treatment just came to me last weekend and so far I'm enjoying it."

Peter Thomas Roth New! Potent-C™ Niacinamide Discoloration Treatment Review, How to Use, Dupes

"That being said, this one struggles to really fade my melasma much. [...] I find most brightening ingredients really don't touch it because it's just such a stubborn, strong form of hyperpigmentation. [...] If you have newer forms of hyperpigmentation, sunspots, or post-acne hyperpigmentation, this may help with that, but for very stubborn, long-lasting hyperpigmentation, it just maybe helped a little bit but it's never going away totally."

New Skincare! The Ordinary Milky Toner, Peter Thomas Roth & Kopari Mineral Sunscreen

"This one feels nice, it has no scent to it. It is on the expensive side, but so far I've tried I think everything from this line from Peter Thomas Roth, the serum, moisturizer, treatment, things like that, and I haven't been disappointed with any of them yet. I will say my skin does sting just a little bit, probably because of the combination, but because niacinamide can have a slight gentle exfoliating effect on skin."

Best Brightening Product Favorites for Radiant Skin - Treat Dark Spots, Hyperpigmentation, Melasma

"The Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment, they also have a discoloration treatment I think they still have it in the pink and silver bottle that one is really nice. The potency serum, the potency moisturizer, all really nice. They're a little bit more expensive than some of the other stuff but it's still worth trying if you don't mind spending a little bit more."

Good Molecules New! Vitamin C Serum with Oryzanol First Impressions Review

Peter Thomas Roth Skincare Best Dupes & Alternatives to Their Most Popular Products

"This is a water-based lotion for brightening skin up. It's got niacinamide, tranexamic acid, daimiethone, alpha arbutin, KA acid, resveratrol, and tetrahexyl ascorbate for brightening skin."

Best Brightening Products for Dark Spots, Hyperpigmentation, Melasma, & PIH - How I Treat My Melasma

"The Peter Thomas Roth Potent-C Niacinamide Discoloration Treatment has niacinamide, tranexamic acid, alpha arbutin, tetrahexyldecyl ascorbate which is a vitamin C derivative, kojic acid, and white mulberry extract. This one runs about $65, but I would check out their website because sometimes their website has better deals than you can find at other places."

The Budget Dermatologist

724k subs

✓Yay

"This is a niacinamide discoloration treatment that has 15% vitamin C in the THD ascorbate form, and this is aimed more towards dark spots to really kind of supercharge that. So if you deal with uneven skin complexion, dark spots, hyperpigmentation, maybe you want to try this."

What the evidence says.

Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

Vitamin C

Topical vitamin C is an antioxidant with reasonable evidence for dullness and uneven tone. It breaks down in light and air, so how a product is formulated and packaged matters as much as the percentage on the front.

Source: DermNet

Niacinamide

Niacinamide has evidence behind it for redness, uneven tone and supporting the skin barrier, and it is usually well tolerated even by skin that reacts to most things.

Source: DermNet