COSRX Mini-Sized 6X Peptide Collagen Booster Toner Serum 1 Fl Oz, Niacinamide & Hyaluronic Acid, Facial Serum, Travel Essentials, Korean Skin Care

Very light and in the few weeks I've been using it I've seen a better texture to my skin and fewer open pores. I like the entire Corsx line.

- I’ve been using The Ordinary’s “Multi Peptide + HA” serum for a few years now. While I like it, I’m not sure that I see that much of a difference. This product is a nice way to try out Cosrx’s peptide serum without buying a full size product.- It is definitely a thinner consistency. It absorbs very quickly and leaves no residue though. Although the lid does make it a little bit hard to get the product out. I think a different lid would be a good idea.- I do really think I’ve begun to see a difference after only a few days of use. My skin looks smoother, more plump and very moisturized. I have noticed that I don’t feel the need to layer on as many other moisturizers after using this. I have very dry skin so that’s a big plus!- The price on the full size product is better though. The full size product is 5 oz for $18.99 and this is 1oz for 9.99. Still worth it if you don’t want to commit to a full size bottle, but if you decide you like it I’d suggest buying the larger bottle. It’s worth it though!

Love the full size, just wanted bottle for vacation and this is perfect. (Easy to refill too)

I've purchased this as a full-sized toner before but this is a nice size that's ideal for travel and having on the go (i.e. post gym or sauna skincare!). The 30 ml bottle is small (perfect travel size) but takes a WHILE to get through honestly. I had another toner this size and it took me nearly two months of general daily use to finish up. With that being said, it is slightly pricier than if you were to buy the full size and potentially decant into your own travel bottle, but it’s the price you pay for convenience (or even to test out the product before committing to the full-size).I have to say, I’m a big fan of Cosrx’s skincare, so that alone encouraged me to get this toner/serum. It’s called a serum on the bottle, but I use it in my toner step and it feels a lot more like a toner in terms of its watery consistency, but the ingredients pack quite a punch so I can see why they’re touting it as a serum. The formula is very thin and light and applies super easy (I just do it by hand) and sinks in quite quickly. After multiple uses, it does feel like my skin feels more hydrated. It sinks in nicely so my other skincare products apply nicely on top as well.I love that there is no added fragrance or known irritants in this formula. There’s lots of good stuff like niacinamide, adenosine, and of course peptides. The peptides are slightly lower in the ingredients than I’d like BUT the ingredients list isn’t very long so that’s good.

I really enjoy this product. It feels very moisturizing and nice on my skin without feeling heavy or greasy at all. It's intended for you to apply this product in very thin layers, so you can kind of choose how much weight you want out of it. My skin reacted well to it, too.However, I only like using this product in the evening because it doesn't absorb very quickly but sits on the skin for a while after drying, so if I use it underneath the specific makeup products I use it tends to make my foundation clump. I don't know whether that's because of the foundation I use, the facial sunscreen I use or what and I still like this product but use other products instead in the morning.

This travel-sized COSRX RX Peptide Serum is a perfect grab-and-go option, especially if you love the full size and just want something compact for vacation, post-gym, or testing out the formula. The 30 ml bottle is TSA-friendly, easy to refill, and lasts surprisingly long—even with daily use.Despite being labeled a “serum,” it feels more like a toner with its light, watery texture. It absorbs beautifully into the skin without stickiness or heaviness, delivering a noticeable boost in hydration. The formulation includes powerhouse ingredients like niacinamide, adenosine, and peptides—without added fragrance or known irritants—making it a great choice for sensitive or acne-prone skin.I love how gentle and moisturizing it is, though some found it better suited for evening use, especially if layering under makeup, as it can leave a slightly tacky finish before fully absorbing.If you’re someone with combination, dry, or sensitive skin that’s difficult to manage, this checks all the boxes: no irritation, great hydration, and solid performance even with thin consistency. While the full-size is a better deal per ounce, the convenience of this travel size is worth it for on-the-go skincare or trial use.Highly recommended for travel, sensitive skin, and layering into your routine with ease.

This is an excellent serum that has multiple beneficial ingredients, including peptides, hyaluronic acid, adenosine, and niacinamide. I am becoming such a fan of Korean skin products because they tend to focus on helping the skin barrier and are often fragrance-free, like this one. My skin is hydrated, soft, and dewy after using this serum and it doesn't leave behind any oiliness or stickiness. The serum is even gentle enough to use on the sensitive skin around my eyes. I like this serum enough that I will likely buy the full size, but this 1 oz size is great for travel or carrying around in my purse. I included a photo of the full ingredient list so that potential buyers can evaluate the ingredients themselves.

Time will tell how this stuff works on my skin. But it does not cause redness on my sensitive skin