Peter Thomas Roth Potent-C Vitamin C Serum — 20% THD Ascorbate, Fragrance-Free Antioxidant

Potent-C™ Power Serum by Peter Thomas Roth is a high-concentration, fragrance-free Vitamin C serum formulated with 20% THD Ascorbate plus Vitamin E and Ferulic Acid to brighten, hydrate, and support firmer-looking skin.

Designed as a clinical-strength daily serum, Potent-C™ Power Serum uses an advanced, ultra-stable form of Vitamin C (THD Ascorbate) at a 20% concentration and pairs it with antioxidants to enhance performance. The lightweight, moisturizing formula aims to address uneven tone, visible fine lines, texture and loss of radiance while remaining color-safe and fragrance-free for broad compatibility with other skincare steps.

How does this serum improve skin brightness and tone?

Potent-C™ relies on THD Ascorbate, a next-generation Vitamin C derivative, to help even skin tone and improve radiance. Its stability allows a higher active percentage without common degradation issues, while complementary antioxidants support overall photostability.

• 20% THD Ascorbate concentration for sustained Vitamin C activity
• 3% Vitamin E and 2% Ferulic Acid to bolster antioxidant support
• Formulated to be color-safe and fragrance-free for sensitive routines

Will this serum help with fine lines, firmness and texture?

The formula targets multiple visible aging concerns using a combination of potent antioxidants and moisturizing ingredients to improve the look of lines, firmness and surface texture. Regular use alongside a complete skincare routine can help maintain smoother-looking skin.

• Antioxidant blend designed to support skin resilience and appearance
• Rich, moisturizing base that helps smooth and soften skin surface
• Compatible with morning or evening routines when layered appropriately

How should I incorporate Potent-C™ Power Serum into my skincare routine?

Apply after cleansing and toning but before heavier creams or oils to maximize absorption of the active ingredients. If using in the morning, follow with broad-spectrum sunscreen; at night, use as part of your repair-focused regimen.

• Use a few drops on clean, dry skin—pat gently until absorbed
• Follow with moisturizer and sunscreen for daytime protection
• Patch-test first if you have very sensitive or reactive skin

Is this product safe for sensitive skin and does it contain fragrance?

Potent-C™ Power Serum is formulated without added fragrance and is described as color-safe, which may increase compatibility for sensitive or reactive skin types. However, its high 20% active concentration means a brief patch test is advised for those who are particularly reactive to strong actives.

• Fragrance-free formulation reduces potential irritation from perfumes
• High-concentration Vitamin C derivative—introduce gradually if concerned
• Works well under makeup and with antioxidant-supporting skincare steps

Who is this for: Peter Thomas Roth Potent-C™ Power Serum is intended for users seeking an evidence-forward, high-strength Vitamin C treatment to boost radiance, support smoother-looking texture, and address signs of aging without added fragrance. It suits those comfortable with clinical-strength actives and anyone looking to add a potent antioxidant serum to a daytime or evening routine, provided they patch-test and layer sunscreen during daytime use.

Ingredients

Water / Aqua / Eau, Tetrahexyldecyl Ascorbate, Butylene Glycol, C9-12 Alkane, Caprylyl Methicone, Tocopheryl Acetate, C10-18 Triglycerides, Polyglyceryl-6 Distearate, Ferulic Acid, Squalane, Propanediol, Sodium Hyaluronate, Zingiber Officinale (Ginger) Root Extract, Curcuma Longa (Turmeric) Root Extract, Panax Ginseng Root Extract, Jojoba Esters, Leuconostoc/Radish Root Ferment Filtrate, Coco-Caprylate/Caprate, Glycerin, Cetyl Alcohol, Polyglyceryl-3 Beeswax, Xanthan Gum, Disodium Edta, Mica, Ethylhexylglycerin, Potassium Sorbate, Sodium Benzoate, Phenoxyethanol