Shoppers on Sephora praise Peter Thomas Roth Potent-C Power Serum for producing fast, visible results—many reviewers report brighter, smoother skin, faded dark spots and acne scars, and diminished fine lines within days to weeks. Reviewers admire the formulation (20% THD ascorbate plus ferulic and vitamin E) for penetrating deeply and delivering both brightening and anti‑aging benefits; several users describe the texture as more lotion‑like than a classic serum, which they find hydrating and easy to layer under makeup. Multiple customers with sun damage or long‑standing hyperpigmentation call this a game changer, and older reviewers credit it with restoring firmness and reducing crepey texture. People with combination or dry skin commonly say a little goes a long way and that the product plumps and smooths without leaving a greasy finish for them. Some users intentionally apply it once daily or mix it with moisturizer to temper potency while preserving results. At the same time, a subset of reviewers cautions that the formula can feel heavy or oily for oilier skin types and that sensitive or acne‑prone skin sometimes reacts with breakouts, irritation, or redness—several recommend sampling first and introducing it gradually. A recurring, uncommon detail: many customers notice a strong, savory/meaty odor (described as bacon or meat‑like) that fades quickly but bothers some enough to avoid repurchasing. Finally, shoppers repeatedly point out the high price and suggest trying samples during Sephora visits or waiting for promotions before committing to full size.

Amazon reviewers largely praise the Peter Thomas Roth Potent-C Power Serum for brightening and evening skin tone, softening texture, and working well around the eyes when paired with the matching eye cream. Many reviewers report a creamy, smooth texture that layers easily with other products and absorbs without greasiness for some users. Multiple buyers with sensitive skin highlight that the formula tolerated their skin better than L-ascorbic acid serums and delivered gradual improvements, while a few long-term users compare its potency and packaging favorably against higher‑strength THD ascorbate competitors. At the same time, reviewers frequently call out a strong, unusual smell—described variously as metallic, cedar- or barbecue-like—which some tolerate but others find off-putting. A subset of customers experienced irritation, redness, or breakouts and warned that results vary by skin type. Several users also note a mismatch between bottle size and perceived quantity, and opinions split on value: some feel the product justifies its price for sensitive-skin performance, while others consider it costly for the benefits received.

Shoppers on Sephora praise Peter Thomas Roth Potent-C Power Serum for producing fast, visible results—many reviewers report brighter, smoother skin, faded dark spots and acne scars, and diminished fine lines within days to weeks. Reviewers admire the formulation (20% THD ascorbate plus ferulic and vitamin E) for penetrating deeply and delivering both brightening and anti‑aging benefits; several users describe the texture as more lotion‑like than a classic serum, which they find hydrating and easy to layer under makeup. Multiple customers with sun damage or long‑standing hyperpigmentation call this a game changer, and older reviewers credit it with restoring firmness and reducing crepey texture. People with combination or dry skin commonly say a little goes a long way and that the product plumps and smooths without leaving a greasy finish for them. Some users intentionally apply it once daily or mix it with moisturizer to temper potency while preserving results. At the same time, a subset of reviewers cautions that the formula can feel heavy or oily for oilier skin types and that sensitive or acne‑prone skin sometimes reacts with breakouts, irritation, or redness—several recommend sampling first and introducing it gradually. A recurring, uncommon detail: many customers notice a strong, savory/meaty odor (described as bacon or meat‑like) that fades quickly but bothers some enough to avoid repurchasing. Finally, shoppers repeatedly point out the high price and suggest trying samples during Sephora visits or waiting for promotions before committing to full size.

Amazon reviewers largely praise the Peter Thomas Roth Potent-C Power Serum for brightening and evening skin tone, softening texture, and working well around the eyes when paired with the matching eye cream. Many reviewers report a creamy, smooth texture that layers easily with other products and absorbs without greasiness for some users. Multiple buyers with sensitive skin highlight that the formula tolerated their skin better than L-ascorbic acid serums and delivered gradual improvements, while a few long-term users compare its potency and packaging favorably against higher‑strength THD ascorbate competitors. At the same time, reviewers frequently call out a strong, unusual smell—described variously as metallic, cedar- or barbecue-like—which some tolerate but others find off-putting. A subset of customers experienced irritation, redness, or breakouts and warned that results vary by skin type. Several users also note a mismatch between bottle size and perceived quantity, and opinions split on value: some feel the product justifies its price for sensitive-skin performance, while others consider it costly for the benefits received.