📖 PRODUCT COMBINATION GUIDANCE 📖 Our Vitamin C 23 Serum contains a high concentration of pure Vitamin C. For optimal performance and ingredient stability, we recommend avoiding concurrent use with highly concentrated peptide-based products, including our Blue Peptide Serum and Blue Peptide Cream, as well as other high-strength actives such as Retinol products and our Niacinamide 15 Serum. We recommend applying these products at different times of day rather than within the same routine. For example, use Vitamin C 23 Serum in the morning and Blue Peptide Serum or Blue Peptide Cream in the evening. ANTIOXIDANT SYNERGY: A powerful antioxidant complex works in synergy with Vitamin C to help neutralise free radicals. Pure Vitamin C + Super Vitamin E + Glutathione. NO MORE DISTINCTIVE SCENT: Upgraded with an advanced formula for improved everyday use. The previously distinctive scent has been removed while maintaining the original 23% pure Vitamin C concentration. LIGHTWEIGHT, NON-STICKY VITAMIN C BOOSTER SERUM: Helps address the early signs of ageing and boost skin radiance, leaving skin feeling hydrated without a sticky residue. HOW TO USE: Shake gently 1-2 times before use. Apply 2-3 drops once or twice daily. For daytime use, follow with an SPF 30+ sunscreen. Suitable for use around the eye area, avoiding direct contact with the eyes. Once opened, store in the refrigerator to help minimise oxidation. PATCH TEST RECOMMENDED: We recommend performing a patch test before first use. Apply a small amount to a discreet area of skin and wait 24 hours. If no irritation occurs, proceed with facial application. Discontinue use and consult a healthcare professional if irritation develops.