Discover our stress-free sustainable new curation: Itfer

FREE EU and International Shipping Available on orders from over £88 • FREE UK Delivery on orders over £35

COSRX AC Collection Blemish Spot Clearing Serum


Regular price £16.00 Sale price £24.99

COSRX AC Spot Clearing Serum is a multifunctional serum used to calm and heal acne breakouts, containing 4% niacinamide to help fade dark spots. Aside from being cruelty free and paraben free, it also helps to calm, soothe, brighten and strengthen skin.

Key Ingredients:

  1. CentellAC-Rx Complex

An all-in-one solution containing Madecassic Acid that protects and calms the skin, Asiaticoside to maintain transparent and clear skin, while the Asiatic Acid helps improve skin barrier.

  1. Niacinamide

The jack of all trades in skincare. Niacinamide, also known as vitamin B3, can help strengthen skin barrier, soothe redness, control sebum and fades hyperpigmentation.

  1. Propolis Extract

A material extracted from bee’s hive which has soothing properties and also reinforces skin’s barrier to repel external particles which may be harmful for the skin



Makes skin feel:


Makes skin look:

Plump, glowing, clear

Other details:


Dermatologically tested


No Parabens

No Sulfates

No Phthalates

No Alcohol

1 bottle: 40ml/ 1.35 fl.oz.

Skin Library is an authorised retailer of COSRX products.


Propolis Extract, Butylene Glycol, Niacinamide, Panthenol, 1,2-Hexanediol, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Ethylhexylglycerin, Glycerin, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate, Allantoin, Melaleuca Alternifolia (Tea Tree) Leaf Oil, Sodium Hyaluronate, Asiaticoside, Asiatic acid, Madecassic acid, Helianthus Annus (Sunflower) Seed Oil, Macadamia Ternifolia Seed Oil, Sucrose distearate, Glyceryl Stearate, Hydrogenated Lecithin, Dipropylene Glycol, Ceramide NP, rh-Oligopeptide-1.

To find out more check out our Ingredient Dictionary.

Product descriptions and ingredient lists are updated periodically. Upon receiving the product please make sure you check the ingredient list on the packaging to ensure you do not have any allergies to the ingredients listed.

How to use

(!) Always perform a patch test with new products, if an allergic reaction occurs discontinue use immediately and consult your doctor (!)

Step 1: After applying essence, take 2-3 drops and apply evenly across your face

Step 2: Massage it into your face for better absorption, then follow up with your favourite moisturiser.

Librarian Tip 1: To speed up the recovery of the skin, mix with COSRX Advanced 96 Snail Mucin Power Essence

Librarian Tip 2: For the stubborn breakouts, after applying the serum across your entire face, soak a cotton pad with the serum and place it onto the affected area for a few minutes


Open tab

All orders (Standard and Express) placed after 9:00am GMT/BST will be despatched on the next working day. Please note, we observe UK bank holidays so orders are not processed on the weekends and UK bank holidays. On some occasions such as sale periods, orders can take up to 2 working days to be processed and despatched.

Orders with items on pre-order will be despatched together once the item has been restocked. 

UK and Northern Ireland – Standard

  • Free on orders over £35
  • £3.99 on orders under £35
  • Delivered 3-5 working days after despatch

UK and Northern Ireland – Express

  • £5.50
  • Delivered 1-3 working days after despatch

Europe – Standard

  • Free on orders over £88
  • £9.00 on orders under £88
  • Delivered 5-7 working days after despatch

USA – Standard

  • Free on orders over £88
  • £11.00 on orders under £88
  • Delivered 7-14 working days after despatch

Kuwait, Qatar and UAE – Standard

  • Free on orders over £90
  • £9.00 on orders under £90
  • Delivered 5-7 working days after despatch

For further information, please refer to our Shipping & Returns page.


Close (esc)

First shop with us? Sign up to our newsletter to get 10% off!

Get exclusive content, discounts and updates on our new launches

Age verification

By clicking enter you are verifying that you are old enough to consume alcohol.


Shopping Basket

Your Basket is currently empty.
Shop now