
Premium listing verified: Official Peter Thomas Roth brand content on the Amazon listing (From Peter Thomas Roth); manufacturer Peter Thomas Roth and model number 15-01-049 as printed in the product details.
Peter Thomas Roth Potent-C Power Serum
The fullest ferulic formula in this edit: 20 percent THD ascorbate, backed by vitamin E and ferulic acid at declared levels.
Potent-C takes the top spot because it publishes the fullest antioxidant architecture in the edit: 20 percent THD ascorbate with vitamin E at 3 percent and ferulic acid at 2 percent, all printed, all in a fragrance free pump. It delivers the classic trio readers look for, in a stable form that does not punish beginners or demand cold storage rituals.
The specification
- Vitamin C Form
- THD Ascorbate, 20 percent
- Key Supporting Actives
- Vitamin E 3 percent, Ferulic Acid 2 percent, Squalane
- Size
- 30 ml / 1 fl oz
- Format
- Pump serum, fragrance free
- Model
- 15-01-049, as printed on the listing
Strengths
- 20 percent THD ascorbate is the highest vitamin C level declared by any serum in this edit
- Vitamin E at 3 percent and ferulic acid at 2 percent are both printed on the listing, not left vague
- Fragrance free formula in a pump bottle, so the serum is not exposed to air at every use
Limitations
- The richer, moisturising texture can feel heavy under makeup on oily skin
- THD ascorbate is a different ingredient from pure L-ascorbic acid, which matters to readers who specifically want the pure form
- Prestige tier pricing for a 30 ml bottle
What owners report
In praise
- The cushioned texture, which many owners describe as a serum and light moisturiser in one step
- A visible glow and more even looking tone with steady morning use
- The hygienic pump and the absence of a dropper to handle
With reservations
- The texture reads as too rich for some oily and combination skin owners
- The bottle gives little warning before it runs out
- Some owners prefer the feel of a classic water based vitamin C and find this one different from what they expected
Suits
Readers who want the classic vitamin C, vitamin E and ferulic acid architecture at the highest declared levels in this edit, in a stable oil soluble form.
Skip if
You prefer a water light pure L-ascorbic acid serum, or your skin is oily and dislikes richer, more cushioned textures.








