COSRX
COSRX RX 高级维生素 C23 精华液，20克
COSRX RX 高级维生素 C23 精华液，20克
@cosme rating: 5.7/7.0
Over 4.55 million bottles sold! C23 Serum has been renewed!
✓ 100% authentic
✓ Ships from Japan in 3-5 days
✓ Duties prepaid for US orders
✓ Tracked delivery via Japan Post
无法加载取货服务可用情况
What it is
Ingredients
Water, ascorbic acid, BG, dimethicone, panthenol, 3-0-ethyl ascorbic acid, squalane, sodium hydroxide, caffeine, sodium hyaluronate, sodium metaphosphate, adenosine, acetyl glucosamine, gardenia fruit extract, allantoin, dextrin, tocotrienol, tocopherol, palm oil, arginine, niacinamide, pentylene glycol, glutathione, sunflower seed oil, methyl trimethicone, safflower oil, camellia seed oil, carrot root extract, licorice root extract, beta-carotene
How to use
洗脸并使用爽肤水后，轻轻按压滴管头，取适量于掌心，用指尖轻轻涂抹于肌肤。[使用及储存注意事项] 请谨慎使用，并密切注意肌肤的任何异常情况。请勿用于有伤口、肿胀、湿疹或其他异常部位。如果本产品不适合您的肤质，例如出现以下情况，请停止使用。继续使用可能会加重症状，因此建议咨询皮肤科医生。* 使用过程中，如果出现发红、肿胀、瘙痒、刺激、变色（白斑等）或肤色变深等异常情况。如果上述异常情况发生在使用本产品后的皮肤直接暴露于阳光下。使用后请务必盖紧瓶盖。请将本品放在儿童不能接触的地方。请勿存放于过热或过冷的地方，或阳光直射处。
We ship internationally from Japan!
Frequently Asked Questions
Is this authentic?
Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.
We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.
What are your shipping rates?
On orders under US$75, shipping is a flat US$20 to the United States and US$10 to all other countries.
Orders of US$75 or more ship free, applied automatically at checkout. Your exact shipping cost is shown before you pay.
How long does delivery take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 business days
- Canada, United Kingdom, France, Germany: 9 to 12 business days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 business days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 business days
- Rest of the world: 11 to 18 business days
Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Do you offer express shipping?
Yes. As of 22 July 2026, we offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I pay customs or import fees?
US orders: No. As of July 1, 2026, all US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
Orders outside the US: Possibly. Duties and import taxes are set by your local customs authority and are not collected at checkout, so any charges on delivery are your responsibility.
We're working on rolling out prepaid duties for more countries soon.
The texture is similar to a typical vitamin C serum. It comes in a dropper, making it easy to use, and I mainly use it in the morning. I haven't had any major skin problems, and I think it's helping to stabilize my skin. I'm happy with the feel and results, but I won't be repurchasing it for now, as I want to try out a variety of products.
COSRX Advanced The Vitamin C 23 Serum: ★ This serum contains a highly concentrated amount of pure vitamin C (23%) plus powerful antioxidants to address dark spots and dullness, resulting in brighter, firmer skin! It also contains antioxidants like vitamin E and niacinamide, which supposedly prevent oxidation, a major cause of skin aging. ★ This serum simultaneously moisturizes and treats rough skin, while hyaluronic acid moisturizes, while allantoin and panthenol soothe redness and irritation. It also addresses the dryness and tingling that can be common with vitamin C. The texture is like a light oil, leaving your skin feeling bouncy and smooth upon application. While many vitamin-based products have a strong scent, this one has a pleasant, subtle fragrance. Keep it in the refrigerator.
The texture is similar to a typical vitamin C serum. It comes in a dropper, making it easy to use, and I mainly use it in the morning. I haven't had any major skin problems, and I think it's helping to stabilize my skin. I'm happy with the feel and results, but I won't be repurchasing it for now, as I want to try out a variety of products.
I bought this product because it gave me a perfect compatibility rating on Suzykirei. It's been about three weeks since I started using it (though it may have been compatible with other products), and when I had my skin checked at the cosmetics counter, I noticed a significant improvement, especially in the pores and texture. These two scores are almost perfect. Since I was about to run out of foundation, I had them match my color (a different product), and it brightened my skin by two tones. I haven't noticed any noticeable blemishes disappearing, but it seems to have worked for my skin. I use it after moisturizing my skin with lotion, but I take an appropriate amount and blend it all over my face. It feels sticky and absorbs into my skin, which I think is a sign that it's absorbed. If I don't blend it in enough, it feels like it will mix with the lotion I apply after. It doesn't feel particularly tingly, and I like that it's easily available at drugstores.
COSRX Advanced The Vitamin C 23 Serum: ★ This serum contains a highly concentrated amount of pure vitamin C (23%) plus powerful antioxidants to address dark spots and dullness, resulting in brighter, firmer skin! It also contains antioxidants like vitamin E and niacinamide, which supposedly prevent oxidation, a major cause of skin aging. ★ This serum simultaneously moisturizes and treats rough skin, while hyaluronic acid moisturizes, while allantoin and panthenol soothe redness and irritation. It also addresses the dryness and tingling that can be common with vitamin C. The texture is like a light oil, leaving your skin feeling bouncy and smooth upon application. While many vitamin-based products have a strong scent, this one has a pleasant, subtle fragrance. Keep it in the refrigerator.