Use the following zoom and pan buttons to control the image that follows them
Tab through the images or use the previous or next buttons to navigate each product image
Online only price
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
This brand is excluded from most Ulta Beauty coupons.
We think you'll like
12 items
Use previous and next buttons to navigate the slides of the We think you'll like Product Carousel
Clinique
Clinique Smart Clinical Repair Wrinkle Correcting Serum
Estée Lauder
Revitalizing Supreme+ Night Power Bounce Cream Moisturizer with Peptides
Clinique
Moisture Surge 100H Auto-Replenishing Hydrator Gel Moisturizer with Hyaluronic Acid
Clarins
DOUBLE SERUM Eye Firming & Hydrating Concentrate
Sponsored products
12 items
Use previous and next buttons to navigate the slides of the Sponsored products Product Carousel
Erborian
CC Red Correct Green Color Corrector SPF25
Questions
Q&A
Showing 5 out of 7 Questions
- 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
- Q
What size is this
- Asked by Julie
- Official Answer By COSRX - Brand Engage0.70 oz.Was this answer helpful to you
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
Don't Love It
I generally like COSRX products, however this product is not my favorite. Initially, when I opened the product, it sounded like opening a can of soda. I wasn't sure if that's the way the product is supposed to sound upon initial opening so I used it but my face does not love it. I'm thinking maybe I...
47 results
Game changer
I knew I had some discoloration on my face and my skin felt dull, but hot dog I didn't realize how much so until I started to use this product and saw such a difference! I have dark purple circles around my eyes and nose and just a few drops at the top of my cheeks, under my eyebrows (don't want to get too close to my eyes), and around my nose have changed the game!! The texture of my skin has improved, there's so much less dicoloration, and my fine lines are softening. This truly was the step I was missing from my beauty routine! I can't recommend it enough, especially for the price.
great Vitamin C Product
Purchased this on the Ulta beauty sale i really like it i have in my fridge i use it at night feels good on the skin and absorbs. i liked it so much i purchased a second bottle
Not worth it
The smell is horrible and it oxidized really quick. Also, the bottle is only half full. I finished the first bottle within 1 month, which is odd for me because it usually takes me close to 3 months to finish a 1 oz bottle. So I checked the second bottle I ordered and it was only half full. I won't be ordering this product again.
Don't Love It
I generally like COSRX products, however this product is not my favorite. Initially, when I opened the product, it sounded like opening a can of soda. I wasn't sure if that's the way the product is supposed to sound upon initial opening so I used it but my face does not love it. I'm thinking maybe I got a bad batch. I'll be returning this product and selecting something different moving forward. 
Potent, works
Smoothing, hydrating, effective. A little goes a long way. Was using paulas choice vitamin c but now switched to this. Better value and more effective. Love this brand- everything except that snail mucin stuff.