The Vitamin C 23 Serum

Q: Can I use The Vitamin C 23 Serum with retinol?
A: It's best not to use them in the same routine; apply vitamin C in the morning and retinol at night to avoid irritation.

Q: Why does this serum need to be refrigerated?
A: Pure ascorbic acid is unstable and can oxidize when exposed to heat and light; refrigeration between 3–10°C helps maintain the serum's potency and extends its freshness.

Q: Is this serum suitable for sensitive skin?
A: Due to the high 23% concentration, those with sensitive or reactive skin should patch test first and may experience initial tingling; if you're new to vitamin C, consider starting with a lower concentration.

Q: How do I know if the serum has oxidized?
A: If the serum changes from its original color to a dark orange or brown shade, it has likely oxidized and should be replaced.

Q: When should I apply this serum in my routine?
A: Apply in the morning after cleansing and toning, then follow with moisturizer and SPF—the antioxidants help protect against daytime environmental damage.

Q: How long until I see results?
A: Most people notice improved brightness within 2–4 weeks, though fading dark spots typically takes 6–8 weeks of consistent daily use.

Q: Do I need to wear sunscreen with this serum?
A: Yes, always follow with SPF 30 or higher during the day; vitamin C can increase sun sensitivity, and sunscreen helps protect your brightening results.

Cleanse and tone your face as usual. Dispense 2–3 drops of the serum onto fingertips. Apply evenly across the entire face, avoiding the eye area. Pat gently into the skin to encourage absorption. Follow with a moisturizer. Apply broad-spectrum SPF as the final step during daytime use. Store the serum refrigerated between 3–10°C to maintain product freshness and stability.

Water, Ascorbic Acid(23%), Propanediol, Dimethicone, Tromethamine, Panthenol, Ethyl Ascorbyl Ether, Squalane, Caffeine, Sodium Chloride, Sodium Hyaluronate, Sodium Sulfite, Disodium EDTA, Glutathione, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Butylene Glycol, Arginine, Niacinamide, Pentylene Glycol, Alcohol Denat., Helianthus Annuus (Sunflower) Seed Oil, Glycyrrhiza Glabra (Licorice) Root Extract, Methyl Trimethicone, Carthamus Tinctorius (Safflower) Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa (Carrot) Root Extract, Beta-Carotene.