COSRX 15% Niacinamide Face Serum, 0.67 fl oz, Pore Minimizer Serum for Face, Even Skin Tone, Korean Skin Care

I’ve been using this Cosrx niacinamide serum as part of my evening skincare routine, right before applying tretinoin, and I’m really happy with the results so far. It’s lightweight, absorbs quickly, and doesn’t leave any sticky residue—huge plus! I’ve noticed an improvement in my overall complexion and my pores appear smaller and more refined.I definitely plan to keep using this and usually repurchase when it’s on sale. My only suggestion is that it should come in a full 1 oz bottle instead of just 0.67 oz—especially for those of us who use it daily. Otherwise, it’s a solid addition to my skincare lineup.

I have large pores on my nose mostly. Have tried just about everything including really expensive products. I decided to try this one last product. I have been using twice daily for a week. I am surprised to say its is working ! Not a miracle ,but I am seeing results! Will update after a few more weeks. easy to apply and the bottle with dropper is excellent No product waist. Give it a try

I love this for my face. I’ve been using it for about a year now. Only complaint is if I stop using it my face breaks out lol. So I keep using it to prevent the acne.

I've been using this for about 2 weeks now morning and night and i can say I see a difference. My pores appear to be shrinking and my skin looks better. I def recommend getting this product if you have large pores.

Muy bueno. Hay diferencia después de aplicarlo, los poros se ven más uniformes. Es suave y no irrita la piel. Llegó muy bien empacado. Lo he usado cada dos días por las noches con el cutis limpio.

I’m 50 with no wrinkles, but I wanted to start using skincare products to help prevent them in the future. I’ve used other COSRX products and really liked them, so I decided to try the 15% niacinamide. After just a week, I noticed a difference, my complexion looked brighter and more even. I don’t have large pores or problematic skin, but overall, I really like this product and will definitely repurchase.

While searching for products to help fade melasma, I decided to get something with niacinamide instead of vitamin C because of its instability. However, I really wish I would have done a little more research.. After using this for almost a month, I found out that the percentage is much too high for first-time users and/or those with sensitive skin. I might have been fine if I would have slowly introduced it into my routine by using the tiniest amount once or twice a week, but I had no idea that we have to build up a tolerance to new treatment products before we can use them daily.So, my skin is very oily, extremely sensitive, with enlarged pores and melasma. Right off the bat I started using a dropper full of this day and night. 🤦🏻‍♀️ BIG mistake. Not only was my face cherry red all day long, but it dried out my skin in certain areas, AND because I did not bring it close to my eyes or lips, there were noticeably brighter rings around them. It looked like I had a shade of concealer around my eyes and lips that was 5x lighter than my skin tone. A little over a week ago I quit using it entirely, thank goodness I did. Within a couple of days the dry areas and red irritation disappeared, while the bright rings finally returned to my normal skin tone. I regret not taking a picture when it was obvious enough for others to see, you will just have to take my word for it. 😋Another reason 15% is too strong—maybe unless you are an EXPEIRENCED user—is that many other products we use already have a small percentage of niacinamide added into their serums/moisturizers. For example, CeraVe has it in almost all of their moisturizers and sunscreens. So layering that on top off 15%, could possibly be giving your skin an overdose of up to 16-20% or more. ❗️🚨❗️ At those concentrations it could be very harsh and do the exact opposite of its intended treatment.That being said, if you already have a tolerance to niacinamide and are using other serums/moisturizers that lack it, I would definitely give this a try. 👍 Otherwise, I strongly suggest starting with 5% and working your way up to 10%. Also, be aware of the niacinamide content in other products you use with this!Finally, as for the product itself, because I used it wrong, I don't have much to truly review other than I did notice it helped with excess sebum control. For me, that only benefit was not worth the side effects I encountered. 🙅🏻‍♀️Also, I noticed a few reviews mention you have to “shake” this before you using it. While that is true, I would not actually shake it as if I am trying to mix a protein drink. Instead, open it and squeeze the dropper to empty it. Close it back up WITHOUT squeezing it again, you want the dropper to be sans product while you do this. Roll it back and forth a few times between your palms like you would a nail polish, turn it around and roll it again. That’s all you have to do.In concluson, because I do love COSRX products, for the extra sebum it got rid of, and the hope that this serum will do its thing when I work up a proper tolerance to it, I rate it 3 stars. They lose two because it is too strong and because they could easily warn consumers how to work up a tolerance for daily use, yet neglect to. 👎I hope this helps.

Love this, always works for me, have been consistently using it every month for over a year. I tried other products and this one is the one that does it for me. It makes your skin feel smooth, and the appearance is good. The scent isn’t bad, I donMt really notice it anymore and it’s not super sticky or anything.