Skip to product information
COSRX Advanced The Vitamin C 23 Serum Reform
  • COSRX Advanced The Vitamin C 23 Serum Reform
COSRX Advanced The Vitamin C 23 Serum Reform
Brand: COSRX

Cart drawer customization is active

Out of stock
$28.99

Size:

100% Authentic

Get points with every dollar you spend!

Skin Type:

Skin Concerns:

A high-potency brightening serum with 23% Ascorbic Acid — one of the highest concentrations available — to visibly reduce dark spots, even skin tone, and boost radiance. Reformulated with Glutathione, Niacinamide, and 3-O-Ethyl Ascorbic Acid for enhanced brightening and antioxidant protection. Shake before use and store in the fridge after opening to preserve potency.

  • 23% Ascorbic Acid delivers powerful brightening and antioxidant defense against environmental damage.
  • Glutathione and Niacinamide work synergistically to reduce hyperpigmentation and even skin tone.
  • 3-O-Ethyl Ascorbic Acid provides a stable, skin-penetrating form of Vitamin C for deeper action.
  • Sodium Hyaluronate and Panthenol hydrate and soothe while actives work.
  • Suitable for use under the eye area — avoid direct eye contact.
  1. Shake one to two times before use.
  2. Apply two to three drops once or twice daily.
  3. For daytime wear, follow with SPF 30+ sunscreen.
  4. Can be applied under the eye area. Avoid direct eye contact.
  5. After opening, store in the fridge to prevent oxidation.

Water/Eau, Ascorbic Acid (23%), Butylene Glycol, Dimethicone, Panthenol, 3-O-Ethyl Ascorbic Acid, Squalane, Sodium Hydroxide, Caffeine, Sodium Hyaluronate, Sodium Metaphosphate, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Arginine, Niacinamide, Pentylene Glycol, Glutathione, Helianthus Annuus (Sunflower) Seed Oil, Methyl Trimethicone, Carthamus Tinctorius (Safflower) Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa (Carrot) Root Extract, Glycyrrhiza Glabra (Licorice) Root Extract, Beta-Carotene.
Shipping
  • FREE shipping on orders over $50 CAD
  • $9.99 CAD flat rate for orders under $50 CAD

Delivery Time:

  • Toronto & GTA (Local) : 1–3 business days
  • Other areas in Canada: 3–7 business days (depending on province & local carrier speed)
  • Order now and we will ship with in 1-2 business days.
  • Tracking information will be provided once your order is shipped.
  • Delivery times may vary during peak seasons or holidays.
  • Have questions about this product? We’re here to help.

Note: We aim to keep ingredient information accurate and up to date. However, formulations may change from time to time. Please refer to the product packaging for the most current ingredient list.

About the Brand

COSRX — Cosmetics + RX — is built on one principle: minimal ingredients, maximum results. Every product leads with a single hero active at an effec...

Shop all COSRX

Frequently asked questions
Is this product authentic?

Yes. We source all products directly from authorized distributors and trusted suppliers. All items are 100% authentic and shipped from Canada.
Is this product suitable for sensitive skin?

Many customers with sensitive skin enjoy this product. However, we always recommend patch testing before first use.
How long does shipping take?

Orders are shipped from Toronto, Canada. Delivery typically takes 1–3 business days within the Greater Toronto Area (GTA) and 3-7 business days for most locations across Canada. Delivery times are estimates and do not include weekends or statutory holidays.
What is your return policy?

We offer a 30-day return policy for eligible items. Products must be unused, unopened, and in their original condition to qualify for a return. For hygiene and safety reasons, opened skincare and beauty products cannot be returned. Please refer to our Return Policy for complete details.
Do you offer free shipping?

Yes. We offer free shipping on orders over $50 CAD. For orders under $50, a flat shipping fee of $9.99 applies across Canada.

Pairs well with

Your Daily Skin Barrier Essential

View all
Sale

Anua PDRN Hyaluronic Acid 100 Moisturizing Cream 60ml

$35.00 CAD $25.95 CAD
$25.95 CAD $35.00 CAD

Customer Service

Need help?

Our team is here to assist you with product recommendations, order questions, shipping inquiries, and more.

Email us: hello@vglebeauty.com

We’ll get back to you as soon as possible.

Live Chat Available

Mon–Sun: 10:00 AM – 9:00 PM (EST)

Free Shipping

Orders $50 CAD

30-Day Return

Easy Returns

Secure Checkout

Safe & Secure

Guaranteed Authentic

Guaranteed Genuine