Sunday Riley C.E.O. 15% Vitamin C Brightening Serum 1.7 oz — THD Ascorbate, Hydrating Antioxidant

This lightweight serum from Sunday Riley delivers an ultra-stable, oil-soluble form of vitamin C (THD ascorbate) to the skin for visible brightening and antioxidant protection. The formula is designed to sink in quickly without heavy residue and pairs hydrating and soothing extracts to help support the skin’s moisture barrier and minimize the appearance of pores and sensitivity. Free from common irritants and cruelty-free, the product aims to leave skin looking more even, dewy, and bouncy.

How does this serum brighten dull or uneven skin?

The serum relies on 15% THD ascorbate, a stable derivative of vitamin C that penetrates the skin more readily than some other forms. Once absorbed, the ingredient helps promote a more luminous surface appearance and target the look of discoloration and dullness.

• 15% THD ascorbate for rapid absorption and sustained brightening.
• Hydrating base that supports smooth, radiant skin finish.
• Antioxidant action helps protect against environmental stressors.

Will this help with loss of firmness and fine lines?

The formula is built to support a firmer-looking texture by combining vitamin C with hydrating and skin-reinforcing actives. You may notice improved skin bounce and a plumper feel as moisture-retaining ingredients replenish the surface.

• THD ascorbate contributes to skin tone and texture improvements.
• Phytosterols help soothe visible sensitivity and support resilience.
• Saccharide Isomerate helps reinforce the moisture barrier for a smoother feel.

Is this suitable for sensitive or reactive skin types?

Sunday Riley designed this serum to balance potent antioxidants with soothing botanicals to reduce the risk of irritation. It is free of common irritants—fragrance, sulfates, parabens—and includes ingredients that calm and support the skin’s protective barrier.

• Fragrance-free and formulated without sulfates, parabens, and phthalates.
• Phytosterols and saccharide isomerate help reduce appearance of sensitivity.
• Oil-soluble vitamin C minimizes surface reactivity while encouraging deeper absorption.

How should I use C.E.O. 15% Vitamin C in my routine?

Apply a few drops to clean, dry skin once daily—morning is ideal for antioxidant protection, though some prefer evening. Follow with a moisturizer and broad-spectrum SPF during the day; vitamin C works best when paired with sunscreen to protect treated skin from new discoloration.

• Use 2–4 drops on face and neck after cleansing and toning.
• Layer moisturizer afterward to lock in hydration and support barrier repair.
• Always apply sunscreen in your daytime routine for optimal protection.

Who is this for: This serum suits anyone seeking a high-strength vitamin C treatment that absorbs quickly and aims to even tone, boost radiance, and improve the look of firmness without heavy residue. It’s appropriate for users who prefer fragrance-free, cruelty-free skincare and for those wanting a clinically advanced vitamin C formula paired with moisturizing and calming actives. Not intended as a medical treatment—consult a dermatologist for sensitive conditions or specific skin concerns.

• Cruelty-Free
• Sulfate-Free
• Paraben-Free
• Gluten-Free
• Soy-Free
• Phthalate-Free
• Fragrance-Free

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.