25% pure vitamin C — clinically proven to improve radiance and firmness from first use.

The IOPE Vitamin C Expert 25% Antioxidant Toning Serum is a next-level brightening serum built around the highest concentration of pure ascorbic acid in the IOPE range. Penta Active technology combines glutathione, ferulic acid and three vitamin C derivatives to maximise stability and effectiveness, while a new stabilisation system slows oxidation for longer-lasting potency. PHA refines skin texture alongside the brightening actives, and the lightweight oil-free base absorbs instantly without stickiness.

Key Benefits

• 25% pure vitamin C brightens, firms and visibly improves radiance from first use
• Penta Active technology — glutathione, ferulic acid and 3 vitamin C derivatives maximise stability
• New oxidation-stabilisation system preserves potency for longer
• PHA refines skin texture and minimises pore appearance
• Lightweight, oil-free formula absorbs instantly without stickiness
• Clinically proven to improve radiance and firmness

Hero Ingredients

• Ascorbic Acid 25% (Pure Vitamin C) — the most potent form of vitamin C for maximum brightening and antioxidant protection
• Glutathione — master antioxidant that inhibits melanin and enhances the brightening effect
• Ferulic Acid — stabilises and amplifies the vitamin C complex for extended efficacy
• 3-O-Ethyl Ascorbic Acid + Ascorbyl Tetraisopalmitate — stable vitamin C derivatives that support the pure form
• Gluconolactone (PHA) — gently refines skin texture with minimal irritation

Who It's For

Dull, uneven or pigmented skin. Experienced vitamin C users who want clinical-level brightening results. Not recommended for beginners — start with a lower concentration if new to vitamin C.

How to Use

After cleansing and toning, smooth a couple of drops over the face and allow to absorb. Use in the morning. Always apply SPF after vitamin C. Store in the fridge to maintain efficacy and delay oxidation.

Fragrance Notice

This product contains Fragrance (Parfum).

Ingredients

Water, Ascorbic Acid, Tromethamine, Dimethicone, Butylene Glycol, Dipropylene Glycol, 3-O-Ethyl Ascorbic Acid, Bis-Ethoxydiglycol Cyclohexane 1,4-Dicarboxylate, Squalane, Caffeine, Sodium Chloride, Panthenol, Acetyl Glucosamine, Sodium Hyaluronate, Gluconolactone, Glutathione, Pentylene Glycol, Fragrance (Parfum), Ascorbyl Tetraisopalmitate, Xanthan Gum, Sodium Sulfite, Disodium EDTA, Gardenia Florida Fruit Extract, Ferulic Acid, Dextrin, Achillea Millefolium Extract, Tocopherol, Arginine, Niacinamide, Glycyrrhiza Glabra (Licorice) Root Extract, Methyl Trimethicone, Carthamus Tinctorius (Safflower) Seed Oil