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Highlights
Summary
COSRX Advanced The Vitamin C 23 Serum returns renewed with improved stability and a gentler, smoother texture. Brightens dark spots and boosts radiance with concentrated 23% vitamin C.
Benefits
- Helps fade hyperpigmentation and brighten overall skin tone
- Reduces visible signs of aging for a smoother, firmer look
- Revives dull skin to reveal a radiant, healthy glow
- Improves uneven skin tone for a more balanced complexion
- Diminishes dark spots for clearer, spotless skin
Features
- New Look, Advanced Formula
- Enhanced clinical performance for visible results
- Upgraded formula with advanced ingredients
- Redesigned packaging with a clean, contemporary feel
Key Ingredients
- 23% Pure Vitamin C (Ascorbic acid) : Antioxidant activity, brightening(improve blemishes and brighten skin), reduce wrinkles and enhance elasticity.
- Super vitamin E(Tocotrienol) : 50 times higher antioxidant activities than tocopherol, stimulate collagen production.
- Hyaluronic acid : Strong moisture retention properties to maintain hydration.
- Allantoin : Soothes and relieves irritation.
Item 2652090
After cleansing, during the serum phase, shake the bottle lightly once or twice from side to side and apply a few drops to the skin. Use fingertips to gently massage and absorb the serum, starting from the inside of the face working towards the edges. KEEP REFRIGERATED (3~10°C) *Please use immediately after purchase and store upright in refrigerator once opened.
Precautions: Attach the enclosed dropper before first use. Use within 2 months after opening. Suitable for both morning and evening use. When used in the morning, apply SPF 30 or higher.
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
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Reviews
Review Snapshot
by PowerReviews
Ratings Distribution
Most Helpful Positive Review
I decided to use Advanced
I decided to use Advanced The Vitamin C23 Serum every other day to go easy on my skin in case there was any sensitivity. (I already have and use a daily and nightly regimen of COSRX products) So, I have only used Advanced The Vitamin C23 Serum 4 times in 8 days,and WOW WOW WOW! It works beautifly, I...
Most Helpful Critical Review
Disappointed
I bought their Vit C serum in the past and had a great experience, so im thinking this may be a malfuction with this specific bottle. I have only used this twice as i bought it 2 days ago… and its turning my face orange :/ like a streaky orange tanning lotion orange. Its not good, and the smell is s...
60 results
Love this
Reviewed at
Love it. I have purchased this 3x now. Makes my skin glow and look youthful. I pair it with the skin barrier serum every day
Undoubtedly it's the best product
Reviewed at
Undoubtedly it's the best product for all skin types and also for the uneven skin tone. I've been using this product for quite sometime in combination with All in one snail serum, it's usually helps me to get back my glow eventually . But the product is not delivered with care and so I've received a damaged package. Team needs to focus on delivering the product with uttermost care.
Highly recommended
Reviewed at
Excellent product. Helped to brighten and even my East Asian complexion which had been dull with slightly darker discolored patches due to long term sun neglect. Did so within 3, 4 weeks when applied alone once daily on cleansed skin without applying moisturiser or other skincare product at the same time. I call my sundown routine as I apply it alone after cleansing my face when the sun sets to remove the sunscreen I have been wearing during daytime. One suggestion of improvement is that the current dropper is not long enough to reach the bottom of the bottle. As a result, there is always a fair amount of serum wasted because I can't reach it by using the dropper.
My favorite vitamin C
Reviewed at
My favorite vitamin C
Shocked by what a difference it makes
Reviewed at
I am SHOCKED by the difference this product makes. When I bought it I wasn't sure if Vit C was really necessary for my skin care routine, and felt silly for buying another product. But I could see the difference after 2 days. My skin looks noticeably tighter and brighter and firmer. I've never used a product with such drastic results. I do not have sensitive skin so went for the 23 and have no regrets. My only problem with it is it says it's supposed to be refrigerated, which is a little inconvenient. Small price to pay. Amazing product.
Questions
Q&A
Showing 5 out of 8 Questions
- Q
In what order do you use this serum and the essence and the 6 peptides
- Asked by Ttt
- Official Answer By COSRX - Brand EngageFor optimal results, we recommend applying skincare from lightest to thickest consistency so active ingredients can properly penetrate the skin. 6 Peptide Skin Booster Serum > Essence > Advanced Vitamin C 23 Serum Make sure to patch test any new products and introduce them gradually into your skincare routine. Don't forget to apply sunscreen during the day, especially after using Vitamin C.Was this answer helpful to you
- Q
When you store in refrigerators do you use cap or dropper cap?
- Asked by CC
- Official Answer By COSRX - Brand EngageYou can use the dropper cap. It has the same effect.Was this answer helpful to you
- Q
Can it be used on sensitive skin
- Asked by Cheryl
- Official Answer By COSRX - Brand EngageYes, this serum can be used on sensitive skin, but we recommend doing a patch test first to ensure it works well for you. Vitamin C can sometimes cause irritation, especially for those with very sensitive skin. If you experience any discomfort, consider using it less frequently or consulting with a dermatologist for personalized advice.Was this answer helpful to you
- Q
Are you supposed to shake gently before each use or just after opening new bottle & securing pipette initially?
- Asked by Confused
- Official Answer By COSRX - Brand EngageIt is recommended to gently shake the serum before each use. This helps to ensure that the ingredients are well-mixed.Was this answer helpful to you
- Q
Can I put on dark spots on chest? Can I keep in a cool, dark place rather than the refrigerator?
- Asked by HC
- Official Answer By COSRX - Brand EngageThis product helps improve skin texture and tone, so it can be beneficial for addressing dark spots. However, it is formulated for facial use, if you wish to use on the body, please patch test first to ensure compatibility with your skin. As for storage, we recommend keeping the serum in the refrigerator to help maintain its potency.Was this answer helpful to you