Peter Thomas Roth Potent-C™ Power Serum 20% THD Ascorbate – Vitamin C, Hydrating, Fragrance-Free

Potent-C™ Power Serum is a high-strength Vitamin C serum featuring 20% THD Ascorbate to brighten, hydrate, and help improve the appearance of lines, tone, and texture.

Peter Thomas Roth Potent-C™ Power Serum pairs an ultra-stable, lipophilic form of Vitamin C (THD Ascorbate) at a clinical 20% concentration with supportive antioxidants—3% Vitamin E and 2% Ferulic Acid—to create a rich, fragrance-free formula designed to target visible signs of aging and uneven skin tone while delivering lasting hydration.

How does this serum brighten and even skin tone?

The serum uses THD Ascorbate, a next-generation Vitamin C derivative that penetrates skin more efficiently than many traditional forms. Together with Vitamin E and Ferulic Acid, it supports a brighter-looking complexion and helps reduce the appearance of discoloration over time.

• 20% THD Ascorbate for effective topical Vitamin C delivery
• 3% Vitamin E to support antioxidant stability
• 2% Ferulic Acid to enhance antioxidant performance
• Fragrance-free formula suitable for sensitive-fragrance preferences

Will this serum help with fine lines and firmness?

Potent-C™ is formulated to address visible texture and signs of aging by delivering concentrated antioxidants and moisture. Regular use may visibly improve the look of fine lines, surface texture, and skin’s overall resilience.

• High-concentration antioxidant complex to support skin’s appearance
• Moisturizing base that helps plump and smooth surface texture
• Designed for daytime or nighttime use under sunscreen or night cream

How do I incorporate this serum into my skincare routine?

Apply the serum after cleansing and toning, before heavier creams or oils, to maximize absorption of active ingredients. Use a few drops across face and neck, then follow with moisturizer and SPF during the day for protection.

• Use morning and/or evening on clean skin
• Apply 2–4 drops to face and neck; gently press into skin
• Layer moisturizer and daytime SPF when used in the morning

Is this suitable for sensitive or color-treated skin?

The formula is fragrance-free and color-safe, designed to be considerate of various skin needs. As with any potent active, introduce gradually and patch-test if you have highly reactive skin.

• Fragrance-free to reduce irritation risk
• Color-safe, compatible with color-treated skin and professional color services
• Start with alternate-day use if you have sensitive skin

Features: Moisturizes and renews; Color safe.

Who is this for: This serum is intended for anyone seeking a potent topical Vitamin C solution—people concerned with dullness, uneven tone, early signs of aging, or texture irregularities. It suits those who prefer high-strength, fragrance-free serums and who will layer SPF during daytime use. If you have particularly reactive skin or specific dermatologic conditions, consult a skincare professional before starting a high-concentration active.

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