Peter Thomas Roth Potent-C Targeted Spot Brightener Review (2020 Update)

Today, I’m going to discuss the powerful Peter Thomas Roth Potent-C Targeted Spot Brightener.

Does this product live up to its claims? Let’s find out. ⭐


ⓘ In today’s post, I’ll share my 2¢ on Peter Thomas Roth Potent-C Targeted Spot Brightener!

Peter Thomas Roth Potent-C Targeted Spot Brightener

Summary: This powerful product helps fade dark spots, age spots, post-acne marks, and stubborn hyperpigmentation.

Best For: Dark Spots, Age Spots, and Post-Acne Marks

Key Ingredients:
10% Vitamin C (THD Ascorbate)
3% Vitamin E
2% Ferulic Acid

Get It @ Ulta Beauty, Sephora

Peter Thomas Roth Potent-C Targeted Spot Brightener
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Vitamin C is an excellent brightening agent as it helps reduce melanin production (dark spots) while also providing antioxidant benefits to calm sensitive skin and decrease inflammatory signals (source: The Roles of Vitamin C in Skin Health, 2017).


The Potent-C collection is based on a vitamin C derivative called Tetrahexyldecyl (THD) Ascorbate, a stable and oil-soluble compound, that gives the overall formula a slightly thicker texture.

In particular, Potent-C Targeted Spot Brightener includes 10% THD Ascorbate to brighten dark spots, along with antioxidant teammates 3% Vitamin E and 2% Ferulic Acid that work synergistically to improve uneven tone, promote a clearer and healthier complexion, and prevent skin damage (sources: Topical L-Ascorbic Acid: Percutaneous Absorption Studies, 2001 and UV Photoprotection by Combination Topical Antioxidants Vitamin C and Vitamin E, 2003).

Peter Thomas Roth Potent-C Targeted Spot Brightener Ad
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(in fact, this formulation is likely inspired by SkinCeuticals C E Ferulic, which uses 15% L-Ascorbic Acid, or pure vitamin C, along with 1% Vitamin E and 0.5% Ferulic Acid)

Peter Thomas Roth also included Gwennis (Algae) Extract and Angelys (Angelica Root) Extract for additional skin lightening benefits (based on a 12 week in vivo study by Peter Thomas Roth).

Finally, customer reviews have been relatively good, with reviews fluctuating between “it worked!” and “I saw no results!” This product helped many users clear up brown spots and post-acne marks. On the other hand, some complained about the smell (due to no fragrance) and high price.

My Verdict: If you have troublesome dark spots or post-acne marks that refuse to part ways, the Potent-C Targeted Spot Brightener can help you “break up” with them for good.

Up Next:
The Best Vitamin C Serums for Hyperpigmentation

Best Vitamin C Serum for Hyperpigmentation
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