The Vitamin C 13 Super Vitamin E + Hyaluronic Acid

COSRX Vitamin C 13 Serum: your vitamin C booster for a radiant complexion

Do you want a complexion full of luminosity, softer-looking fine lines and dark spots that appear less visible? The COSRX Vitamin C 13 Serum – the COSRX The Vitamin C 13 Super Vitamin E + Hyaluronic Acid Serum – is your secret to a visibly revitalised, more even complexion. This serum combines 13% pure vitamin C with super vitamin E and hyaluronic acid to give your skin a fresh glow, hydrate it and protect it from environmental influences.

This serum is a comprehensive solution for a healthy, fresh complexion. The light, fast-absorbing texture makes it an ideal step in your daily routine without weighing down. Discover the power of vitamin C in its purest form.

The power of the ingredients: a synergy team for your skin

The COSRX Vitamin C 13 Serum combines highly potent actives that work together:

• 13% pure vitamin C (Ascorbic Acid & 3-O-Ethyl Ascorbic Acid): The star of this serum, a powerhouse against dull skin. Vitamin C makes dark spots look less visible, gives the complexion luminosity and, as an antioxidant, protects against free radicals. The combination with a stable vitamin C derivative provides improved stability.
• Super vitamin E (Tocotrienols, Tocopherol & Elaeis Guineensis (Palm) Oil): Vitamin E boosts the antioxidant effect of vitamin C, supports the skin's protective barrier and helps preserve the stability of the vitamin C.
• Hyaluronic acid (Sodium Hyaluronate): For hydration. It binds water in the skin, makes it look plumper and suppler and helps make fine lines look softer.
• Niacinamide (vitamin B3): A multi-talent that supports the skin's protective barrier, makes visible redness look softer, refines pores and makes dark spots look less visible.
• Glutathione & Glycyrrhiza Glabra (licorice) root extract: These ingredients support vitamin C in promoting a clear, radiant complexion and softening the appearance of dark spots.

How to add your vitamin C serum to your routine

For an optimal result:

1. Cleanse: Start with gentle cleansing.
2. Toner (optional): Apply a moisturising toner if needed.
3. Serum: Apply 2-3 drops to your cleansed face and gently pat it in, especially on areas with dark spots or fine lines.
4. Moisturiser: Finish with a moisturising cream.
5. Sun protection (during the day): As vitamin C can make the skin more sensitive to light, a daily broad-spectrum sunscreen with at least SPF 30 is essential.

Pro tip: Start 2-3 times per week and increase use as your skin tolerates it. Store the serum cool and dark and use it within 2-3 months of opening.

Complete your routine for maximum radiance

For a comprehensive routine we recommend combining with these COSRX products:

• Step 1 (cleanse): COSRX Low pH Good Morning Gel Cleanser - A gentle low-pH cleanser that cleanses your skin without drying it out.
• Step 2 (essence/hydration): COSRX Advanced Snail 96 Mucin Power Essence - Provides your skin with moisture and creates an ideal base for your vitamin C serum.
• Step 3 (moisturiser): COSRX Advanced Snail 92 All in one cream - A rich cream that supports the skin's protective barrier and seals in moisture.
• Step 4 (sun protection): COSRX Aloe Soothing Sun Cream - A light SPF 50+ sunscreen that protects your skin from UV rays – a must when using vitamin C.

Still have questions? We have the answers!

Does the serum turn brown?

Pure vitamin C (ascorbic acid) is naturally prone to oxidation, which can show as a yellowish to brownish discolouration. This is normal. Store the serum cool and dark and use it promptly after opening (within 2-3 months).

Can I use this serum daily?

Start 2-3 times per week in your evening routine to let your skin adjust. If it tolerates it well, you can increase to once daily (preferably in the evening). Consistent sun protection during the day is essential.

Is the serum suitable for sensitive skin?

Due to the concentration of 13% vitamin C it may tingle slightly at first on very sensitive skin. We recommend a patch test and a slow start. If you have a diagnosed skin condition, please consult a dermatologist.

About COSRX

COSRX is a Korean skincare brand focusing on effective, minimalist products. The name combines "COS" (Cosmetics) and "RX" (prescription). COSRX avoids unnecessary fillers and relies on highly concentrated ingredients such as snail mucin, AHA/BHA and Centella Asiatica.