SKU: 84854033985

COSRX VITAMIN C 23 SERUM 0.7oz

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Ships within 48 hours · Estimated delivery Sep 3 - Sep 8

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Description

COSRX VITAMIN C 23 SERUM 0.7ozHigh Potency Brightening Serum with Pure Vitamin C Formulated with 23% pure ascorbic acid (vitamin C), this powerful serum targets uneven skin tone, dullness, fine lines, and dark spots. COSRX Vitamin C 23 Serum combines high concentration vitamin C with moisturizing ingredients to help reveal a smoother, brighter, and more radiant complexion. To help maintain ingredient stability, the formula features a dual layered texture with a lightweight oil

High-Potency Brightening Serum with Pure Vitamin C

Formulated with 23% pure ascorbic acid (vitamin C), this powerful serum targets uneven skin tone, dullness, fine lines, and dark spots. COSRX Vitamin C 23 Serum combines high-concentration vitamin C with moisturizing ingredients to help reveal a smoother, brighter, and more radiant complexion.

To help maintain ingredient stability, the formula features a dual-layered texture with a lightweight oil layer on top, delivering moisture and minimizing oxidation over time.

Recommended For:

  • Experienced vitamin C users
  • Targeted care for hyperpigmentation, uneven tone, and early signs of aging
  • Those looking for intensive brightening and revitalizing effects

Key Benefits:

  • Helps brighten dull skin and visibly fade dark spots
  • Improves skin texture and elasticity
  • Supports a smoother, more even-toned complexion
  • Lightweight, moisturizing finish with quick absorption
  • Can be used day or night (SPF recommended during daytime use)

Texture:
Dual-phase formula (oil + serum) that blends into a silky texture and absorbs smoothly into skin without greasiness.

Color:
Light yellow tint due to the high content of pure vitamin C.

How to Use:
After cleansing, during the serum step, gently shake the bottle and apply a few drops to the face. Pat gently until absorbed. Use once or twice daily. For morning use, follow with sunscreen (SPF 30+).

Storage Tips:

  • Store in the refrigerator (3–10°C) after opening
  • Use within 2 months of opening
  • Insert dropper after first use for freshness

Key Ingredients:

  • 23% Pure Vitamin C (Ascorbic Acid): Brightens skin, helps reduce dark spots, and supports elasticity
  • Super Vitamin E (Tocotrienol): Antioxidant-rich, supports collagen and skin defense
  • Hyaluronic Acid: Deep hydration and moisture retention
  • Allantoin: Soothes and comforts irritated skin


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 84854033985

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4.6 ★★★★★
Based on 7 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
Alexandria, US
★★★★★ 3
Not well made
I have used these for 2 weeks now and one of them has a hole in the sole... I won't ever buy them again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 15, 2025
K
Verified Purchase
K. Davis
Lowell, US
★★★★★ 5
Works for foot psoraisis
Size: 2 pairs black L
Got these for work (service industry) to reduce issues with psoriasis and blisters while putting on 20k+ steps a day. Over time the wounds healed and I could work without so much pain. I now don't use them all the time like I used to, only when a new lesion or blister appears, too prevent a breakout. Tip: if you're not in full breakout, wear thick socks under these as a barrier to friction.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
K
Verified Purchase
Kim C
Waukegan, US
★★★★★ 4
Work well but run small
Size: 1 pair black L
They do seem to run a bit small. I bought them for my bf but snagged them from him because I couldn’t resist! I’m about a W8/12 and they were just a little big but unlike others, I just put them on while sleeping and didn’t walk around with them. If you’re just planning on that, they did a great job at sloughing and moisturizing 😎
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
A
Verified Purchase
Aaron Duncan
Lowell, US
★★★★★ 5
Good socks they work.
Size: 2 pairs black L
I normally wear size 13&half to 14 men's, and these fit me ok. They sit just below the ankle. They can get a little tight for me so you should look out for that if you are on the thicker side. But they work as advertised and help moisturize your feet. I recommend wearing them if you're going to just be hanging around home for a bit in one spot as they can be a little slippery to walk in if you go fast. Would not recommend going up and down stairs.
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Reviewed in the United States on August 28, 2025
B
Verified Purchase
Brian
Port Orchard, US
★★★★★ 5
Good socks
Size: 1 pair black L
Good socks
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026

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