Sunday Riley C.E.O. 15% Vitamin C Brightening Serum, Orange 1 oz — Stable THD Ascorbate, Antioxidant Radiance

Sunday Riley C.E.O. 15% Vitamin C Brightening Serum is a fast-absorbing, antioxidant-rich vitamin C serum formulated to brighten skin tone, reduce the look of discoloration, and impart a healthy-looking glow.

Powered by 15% THD ascorbate, a stable, oil-soluble form of vitamin C, this serum is blended with supportive botanicals and a phytosterol complex to soothe and clarify. It’s designed to be non-irritating while delivering visible brightening and antioxidant support, making it a practical addition to daily skincare routines for those seeking more even tone and radiance.

How does this vitamin C serum improve dull or uneven skin tone?

The concentrated 15% THD ascorbate works to even skin tone by helping fade the appearance of dark spots and reducing the look of discoloration over time. It delivers antioxidant protection that helps skin appear clearer and more luminous when used consistently.

• 15% THD ascorbate — a stable, oil-compatible form of vitamin C for brightening
• Targets visible dark spots and surface discoloration
• Antioxidant action helps skin look more clarified and radiant

Will this serum suit sensitive or reactive skin?

The formula pairs active vitamin C with a phytosterol complex derived from soy to help reduce the look of redness and sensitivity. It’s created to be fast-absorbing and non-irritating, but patch testing is recommended for very reactive skin.

• Phytosterols help calm the appearance of redness
• Balanced formulation minimizes harshness commonly linked to strong actives
• Start with every-other-day use if you have highly reactive skin

How should I add the C.E.O. serum into my routine for best results?

Apply the serum to clean, dry skin once or twice daily, morning and/or evening, before heavier moisturizers and sunscreen. Allow a moment for absorption and follow with a hydrating moisturizer and SPF in daytime to protect results.

• Use after cleansing and toning on dry skin
• Layer creams or oils on top for added hydration
• Always follow with a broad-spectrum sunscreen during the day

What visible changes can I expect and how soon?

Many users notice improved radiance and a more even complexion with regular use; the timeline varies by skin type and consistency. Gradual reduction in the appearance of dullness and dark spots typically becomes more apparent after several weeks of continued application.

• Improved surface radiance often seen within weeks
• Reduction in visible discoloration with consistent ongoing use
• Results depend on baseline skin condition and routine adherence

Who this is for: This serum is designed for people seeking a potent, stable vitamin C treatment to address dullness, uneven tone, and early signs of environmental damage without heavy irritation. It suits most skin types, including those looking for antioxidant protection and a brighter complexion, though those with very sensitive skin should introduce it gradually and consider a patch test first.

Ingredients

INGREDIENTS: Water/Eau/Aqua, Tetrahexyldecyl Ascorbate, Squalane, Polyglyceryl-6 Distearate, PEG-8 Beeswax, PPG-12/SMDI Copolymer, Glycine Soja (Soybean) Sterols, Sodium Phytate, Tocopherol, Acetamidoethoxyethanol, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Jojoba Esters, Glycolic Acid, Caprylyl Glycol, Cetyl Alcohol, Polyglyceryl-3 Beeswax, Chlorphenesin, Glycerin, Polysorbate 60, Sorbitan Isostearate, Saccharide Isomerate, Citrus Aurantium Dulcis (Orange) Peel Oil, Citrus Tangerina (Tangerine) Peel Oil, Linalool, Limonene, Phenoxyethanol.