Peter Thomas RothOur writers and editors independently determine what we cover and recommend. When you buy through our links, E! may earn a commission. Learn more.
Skincare can feel like an endless cycle: you set aside the budget, order a product, and then wait—hoping for the results you’re after. The excitement of trying something new is quickly followed by the anxiety of wondering if it will actually work. That’s why products that deliver instant results are so gratifying, and the Peter Thomas Roth Potent-C Power Serum is a prime example.
Shoppers rave about seeing a noticeable difference in dark spots, firmness, and fine lines just hours after their first use. This powerful serum uses a supercharged form of Vitamin C that’s 50 times more effective than the usual kinds (according to the brand), giving you faster and more noticeable results for your skin.
Packed with antioxidants like Vitamin E and Ferulic Acid, this serum fights the signs of aging while brightening and firming your skin. For a very limited time, you can get 50% off, plus free shipping and samples of top-selling Peter Thomas Roth products with code CPOWER50. Plus, you get free shipping and free samples!
Peter Thomas Roth Potent-C Vitamin C Power Serum
Apply this powerful Vitamin C serum to clean, dry skin morning and night to brighten, firm, smooth fine lines, and diminish dark spots with a potent blend of THD ascorbate, ferulic acid, and vitamin E.
See what shoppers are saying about this Vitamin C serum—reviewers rave about their immediate results!
Peter Thomas Roth Potent-C Vitamin C Power Serum Reviews
"I have very sensitive skin and it is hard to find a product that does not cause a breakout and severe dryness. However, after applying this product I saw immediate results within a couple of hours. After, using the product for three days the results were amazing!!! The wrinkles were less visible and my skin did not dry up or get irritated."
"I can’t believe how much this has changed my skin in just 48 hours of use! My skin has been dry, flakey yet acne prone all winter. This year has been the first year I have had to change all of my skin care....wish I had found this sooner! My skin is so smooth, calm with less redness along with it doing a great job at clearing up my breakouts. I will be buying more!"
"I am the biggest skeptic when it comes to product claims of softer lines, better skin, etc...it's RARE unless you spend hundreds and hundreds of $$. I bought this on Sunday, today is Wednesday and my skin has a VAST improvement that I can't believe."
"My skin was noticeably different after a single use of this product. I woke up feeling extra hydrated without looking oily or feeling heavy and my skin looked brighter. This has been especially beneficial after a long night out; my normally very sensitive skin gets blotchy and enflamed from alcohol but using the serum before bed has saved my face from the day after."
If you're still shopping, you'll love this 45% discount on IT Cosmetics CC Cream.
How We Choose
The E! Insider Shop editors and writers search the internet to find the best products out there. We interview expert sources, comb through customer reviews, and use our own personal experiences to make shopping easier for our readers.
As an editorial team, we independently create content and determine coverage based on research, reporting and what we think our readers would like to read about. The goal of our content is to provide a service and inform readers who are on the hunt for the latest products to help make their life better. Items are sold by retailer, not E!. Pricing and availability are accurate as of publish time.