Friday, March 31, 2023
K-Beauty Reviews Skincare

COSRX AC Collection Blemish Spot Clearing Serum Review

5 1 vote
Article Rating

You may or may not already know this; the COSRX AC collection blemish spot clearing serum was one of the additions I made to my acne spots & hyperpigmentation routine. It’s been a couple months since I first tried it, I’ve had a repurchase and shared a review on Instagram .

However, it deserves a proper review on the blog and this post contains all there is to learn about the product. I’ll be sharing all about its claims, legendary ingredients, actual effectiveness and my overall thoughts.

cosrx blemish spot cleaing serum dropper shot khairahscorner pinterest


You can use my ‘rewards code’ KHAIRAH21 to get some $$ off all orders on Yesstyle 💰, no minimum spending required!

Please use the links below for each product if you’d like to shop any of them. Some of them are affiliates so I get a tiny commission for completed purchases at no cost to you!

This contributes to the maintenance of the blog, so I absolutely would appreciate you using the links!🖤

About COSRX AC Collection Blemish Serum

A total solution serum which clears all traces of acne including red, dark spots and scars.

The COSRX blemish serum is one of the products from the brand’s AC Collection; a collection of products aimed to specifically target acne and help heal the skin from acne damages. It’s marketed as the “ideal serum for 3 way post-acne care“. It helps in “calming active red spots“, “clearing dark & after-acne spots” and “recovering from acne scars and uneven skin texture“.

cosrx ac collection blemish spot clearing serum review khairahscorner

The serum contains a unique Centella complex named CentellAC-RX, formulated by the brand to optimize the effectiveness of the natural Centella ingredient. It comes in a 40ml/1.35 floz size at a price range of $25 – $30 and you can shop it from different authorized retail stores.

Shop on:

YesStyle (Use code KHAIRAH21 for extra 2-5% off)

Style Korean

COSRX website


The CentellAC-RX formula is composed of three types of centella asiatica extracts – madecassic acid, asiaticoside and asiatic acid. It has other key ingredients like 4% niacinamide, panthenol, propolis extract, sodium hyaluronate, Ceramide NP, EGF (aka rh-Oligopeptide-1).

As we already know, niacinamide helps with hyperpigmentation and dullness of the skin. EGF helps in stimulating production of collagen and elastin and ceramide helps to lock in moisture in the skin, amongst other benefits.

It also has ectoin, which helps to protect the skin from environmental stressors like UV and pollutants, which cause premature aging.

Basically, it’s packed with lots of great and effective ingredients.

How to Use


It’s recommended to use 2-3 drops for your entire face, avoiding your eyes of course. You don’t have to be conscious of the amount you use, I usually go for the dropper half-filled and use more drops in key spot areas.

One thing to note is to not let dropper touch your face and this applies generally to products with droppers. The droppers may pick up bacteria from your face and it’s just not a good idea. You can use all over your face or specifically for your spots.

With everyday use, I believe the bottle lasted just over a month, about 2 months if used with less frequency.

More skincare reviews to check out:

– COSRX Aloe Soothing SPF 50+ Sun Cream Review

– How Much Skincare Can $120 Get You On YESSTYLE?

– Korean Skincare Starter Kits You NEED To Try In 2021

– Skincare Essentials for Oily Acne-Prone Skin

First Thoughts & Impressions

The first thing to notice about this serum is its minimal but durable packaging. It comes in a transparent bottle, made of thick glass and I’m pretty sure it won’t shatter easily. It also has a good grip, the dropper fits tightly into the bottle and doesn’t drip at all. I appreciated this because I’ve had products with droppers that kept dripping without being pressed and it was so inconvenient.

It’s a transparent, watery liquid and has a very lightweight texture. It doesn’t feel sticky upon application and absorbs quite easily into the skin.

cosrx blemish spot cleaing serum dropper shot khairahscorner

It took a while but I did notice some fading of acne spots and it may have also contributed to repairing my skin texture. I was on a routine with both this serum and the COSRX BHA blackhead power liquid; they were a great pair for my skin texture!

However, it didn’t really do much to repair my acne scars. I’d hoped the EGF ingredient would help boost collagen and repair some of my scarred areas but I didn’t see any significant effect. Still, it works for the spots and also helped with some redness.

It’s a litttttllleee bit pricey for its size, especially since it works slowly. It took me using more than 1 bottle and still didn’t fade the spots completely.

Final Thoughts

Overall, I think it’s a pretty nice product and one to try. It may not have worked as effectively as I’d hoped but I’m glad I decided to test it out.

Will I recommend? If you have hyperpigmentation/acne spots to fade, this could be worth the try. It may not be ideal for stubborn acne spots that don’t fade easily, but with time and proper consistency, you should see results.

Again, as the saying goes, “skincare is not one-size-fits-all” so it might work out better for you than it did for me.

Will I repurchase? I made a repurchase after my first bottle, just to ascertain its full effectiveness. However, it turned out the same and didn’t fully fade all my spots. It’s a worthy buy but I won’t be repurchasing anymore.

**All pictures used in this post are mine.

cosrx ac collection blemish spot clearing serum about blogpost khairahscorner

Thank you for reading and I hope the review was quite helpful! You can use the links above to purchase this product and the coupons as well.

Let me know in the comments if you’ve tried this serum before and what you think of it🖤

Till Next Time,

With Love,



Instagram | YouTube | Twitter | Pinterest | Quora | LinkedIn | Bloglovin’

5 1 vote
Article Rating
Notify of

1 Comment
Inline Feedbacks
View all comments

Hi, I'm Airah, a Frontend Engineer & Content Creator of all things Modest Fashion, Lifestyle and Skincare. Visit my blog at
Back To Top
Drop a comment before you leave, please!x