Sunday Riley C.E.O. 15% Vitamin C Brightening Serum — 15% THD Ascorbate, Fast-Absorbing Antioxidant

Sunday Riley C.E.O. 15% Vitamin C Brightening Serum is a fast-absorbing, oil-soluble vitamin C serum (THD ascorbate) designed to brighten skin tone, reduce the appearance of dark spots, and improve the look of firmness and fine lines.

This lightweight serum delivers a highly stable form of vitamin C—THD ascorbate—formulated to penetrate quickly and integrate into skin's surface for visible improvements in radiance and evenness. The formula emphasizes rapid absorption and antioxidant support without heavy residues, making it simple to add into most daytime or evening routines under moisturizers and sunscreens.

How does this serum tackle dullness and dark spots?

The concentrated 15% THD ascorbate targets surface discoloration and helps restore a brighter, more uniform tone. It works at the skin surface to support an even-looking complexion while providing antioxidant protection against environmental stressors that can worsen uneven tone.

• 15% oil-soluble THD ascorbate for improved stability and skin penetration
• Formulated to reduce the visible appearance of dark spots and discolorations
• Antioxidant-rich to help counteract daily environmental aggressors
• Lightweight texture absorbs quickly without oily residue

Will C.E.O. 15% Vitamin C work with other products in my routine?

The serum is designed to layer under moisturizers and sunscreen and pairs well with most hydrators and gentle exfoliants. Because it uses an oil-soluble vitamin C, it integrates smoothly with oil-based and emollient products; avoid combining with highly acidic exfoliants at once to minimize irritation.

• Apply after cleansing and before moisturizers or SPF
• Compatible with most serums, oils, and creams—use caution with strong acids
• Works well within both morning and evening regimens
• Absorbs quickly, making it suitable for layering under sunscreen

What visible effects can I expect and how soon?

Users typically notice improved radiance and a more even tone with consistent use; individual results vary. The oil-soluble THD ascorbate is formulated for rapid uptake so visible changes in brightness and the look of discoloration can appear sooner than with less-stable vitamin C forms.

• Targets dullness and uneven tone for a brighter appearance
• Helps reduce the look of dark spots and discoloration over time
• Supports the appearance of firmer, plumper-looking skin
• Fast-absorbing texture encourages quick visible improvement

How should I use this serum safely for best results?

Apply a few drops to clean, dry skin once or twice daily depending on tolerance. Follow with a moisturizer and daily SPF in the morning; discontinue use if persistent irritation occurs and consult a professional if needed.

• Use 2–3 drops on face and neck after cleansing
• Layer moisturizer and SPF after morning application
• Introduce gradually if you have sensitive skin
• Store in a cool, dry place to preserve stability

Who is this for: Sunday Riley C.E.O. 15% Vitamin C Brightening Serum suits anyone seeking a stable, oil-soluble vitamin C to enhance radiance, reduce the appearance of dark spots, and support firmer-looking skin. It's appropriate for normal to dry or combination skin types looking for quick-absorbing antioxidant protection and improved skin tone; those with very sensitive or reactive skin should patch-test and introduce the product slowly.

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.