Peter Thomas Roth Potent-C Power Serum 20% THD Ascorbate — Vitamin E & Ferulic Acid, Fragrance-Free

Potent-C™ Power Serum is a high-strength vitamin C treatment packing 20% THD Ascorbate with Vitamin E and Ferulic Acid to hydrate, brighten, and help improve the appearance of fine lines and uneven tone.

This lightweight, fragrance-free serum from Peter Thomas Roth uses a stabilized, oil-soluble form of vitamin C (THD Ascorbate) at a clinical 20% concentration, combined with 3% Vitamin E and 2% Ferulic Acid. The formula is designed to deliver antioxidant support while offering moisturizing, skin-smoothing properties and compatibility with color-treated skin. It’s presented as a daily step to complement cleansers, sunscreens, and other targeted treatments.

How does this serum differ from standard vitamin C products?

Unlike traditional ascorbic acid serums, this formula uses THD Ascorbate, an advanced, oil-soluble derivative of vitamin C noted for its stability and skin delivery. The high 20% concentration is supported by two antioxidants (Vitamin E and Ferulic Acid) to enhance performance and product longevity.

• 20% THD Ascorbate for enhanced stability and skin penetration
• 3% Vitamin E and 2% Ferulic Acid for antioxidant synergy
• Fragrance-free formulation suitable for layering under moisturizers

When and how should I include it in my skincare routine?

Apply the serum once or twice daily after cleansing and before heavier creams or sunscreens. A small pump or drop is enough—gently press into skin and allow it to absorb fully before following with moisturizer or SPF in the morning.

• Use on clean, dry skin—morning or evening
• Follow with SPF if used in the daytime
• Compatible with most serums and moisturizers; patch test if combining active treatments

What visible effects can I expect with regular use?

This serum is formulated to address multiple surface concerns: to support a brighter-looking complexion, more even skin tone, and a smoother texture. Results depend on individual skin and regimen consistency; benefits often appear as improved radiance and hydration rather than instant change.

• Targets dullness and uneven tone for a more luminous look
• Helps skin feel smoother and appear more hydrated
• Formulated to address the appearance of fine lines and texture

Is this suitable for sensitive or color-treated skin?

The serum is fragrance-free and labeled color-safe, reducing potential irritants for sensitive and color-treated hair and skin. As with any concentrated active, start slowly—use every other day or perform a patch test if your skin is reactive.

• Fragrance-free to minimize irritation risk
• Color-safe, suitable to use with color-treated hair and scalp areas
• Introduce gradually for sensitive skin; discontinue if irritation occurs

Who is this for: Peter Thomas Roth Potent-C™ Power Serum is made for anyone seeking a high-concentration, scientifically advanced vitamin C option to add to their anti-aging or brightening routine—ideal for users comfortable with potent actives who want a moisturizing, fragrance-free serum that layers easily with other skincare steps.

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