Sunday Riley C.E.O. 15% Vitamin C Brightening Serum — Orange 1.0 fl oz, fast-absorbing antioxidant

Sunday Riley C.E.O. 15% Vitamin C Brightening Serum is a fast-absorbing, antioxidant-rich serum formulated to brighten dull skin, reduce the appearance of dark spots, and boost radiance with a stabilized vitamin C derivative.

This lightweight serum combines 15% THD ascorbate (a stable form of vitamin C) with botanical phytosterols to deliver visible brightening while minimizing irritation. Packaged in a 1.0 fl oz orange glass bottle, the formula is designed to absorb quickly and layer under moisturizers or sunscreen. Sunday Riley pairs lab-grade actives with soothing plant extracts to create a routine-friendly product that targets uneven tone and environmental stressors without heavy residue.

How does this serum brighten and even skin tone?

The serum uses THD ascorbate, a fat-soluble, ultra-stable vitamin C derivative that’s formulated to penetrate the skin and support visible brightening. Combined with antioxidant support, the blend helps improve radiance and reduce the look of discoloration from sun and lifestyle factors. Because THD ascorbate is more stable than plain ascorbic acid, it maintains potency over time and is gentler for sensitive users.

• 15% THD ascorbate for antioxidant protection and brightening
• Formulated to absorb quickly without sticky finish
• Phytosterols complex soothes redness and supports barrier resilience
• Orange glass bottle protects formula and signals potency

Can I use it with other products in my routine?

This serum is designed to layer under moisturizers and sunscreens and works well both morning and evening. For daytime use, pair with a broad-spectrum SPF to protect newly brightened skin from UV-induced discoloration. If you use multiple active treatments, introduce the serum slowly and monitor tolerance before combining with strong exfoliants or retinoids.

• Apply after cleansing and before moisturizer and sunscreen
• Compatible with most hydrating creams and lightweight oils
• Avoid mixing directly on skin with high-strength AHAs/BHAs—space applications
• Use sunscreen daily to protect results from sun damage

What skin types benefit from this formula and how gentle is it?

The C.E.O. serum is formulated for all skin types, including combination and sensitive skin, thanks to its stabilized vitamin C and phytosterol blend. Phytosterols help calm visible redness and support barrier comfort, reducing the risk of irritation commonly seen with less stable vitamin C forms. Still, those with very reactive skin should patch-test before full-face application.

• Suitable for oily, normal, dry, combination, and many sensitive skin types
• Phytosterols included to help minimize redness and sensitivity
• Non-greasy texture that layers well under makeup
• Patch testing recommended for highly reactive skin

How should I apply the serum for best results?

For consistent results, apply a few drops to clean, dry skin once or twice daily depending on tolerance. Gently massage until absorbed, then follow with moisturizer and, during daytime, a broad-spectrum SPF. Consistent use over weeks supports a more even-looking tone and brighter overall appearance.

• Use 1–3 drops on face and neck after cleansing
• Pat or lightly massage until fully absorbed
• Follow immediately with moisturizer and morning SPF
• Introduce gradually if using other strong actives

Who is this for: This serum is for anyone seeking a powerful, stable vitamin C treatment to address dullness, uneven pigmentation, and environmental signs of stress while maintaining a gentle, everyday routine. It suits users who want a lab-backed active with botanical support and prefer a lightweight, fast-absorbing texture that layers well under other skincare steps.

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.