I've been strictly using COSRX products for over 5 years now and I recently added this collagen booster peptide serum to my morning routine, and I've noticed a significant brightening of my skin, and reduced redness on my cheeks. I take the vital proteins at least four times a week, and also use the COSRX birch sap moisturizer after applying this serum. At night time I use the and the hyaluronic acid moisturizer with the eye cream, and I feel that my skin just works so well with COSRX products and none of them break me out. The one step clear pad is my non-negotiable and it clears my skin before I apply the serum, it is light and absorbs quickly into my skin. I feel that my skin has become softer because of it and I would highly recommend this product to anyone who is considering it. You only need a small amount for it to work well so I think it's worth the price and will last me a while too.

I have been using 4 CosRx products and I have been recommending them to friends. There is no smell and I believe it to be a good value for the money. One bottle roughly lasts 4 months. I use it morning and evening. I definitely think that it has made my fine lines less noticeable and has provided extra moisture and improved the texture of my skin. I think that it has also helped my botox last longer ??. I will continue to use this serum. Love it! It absorbs really quickly and it is very thin which feels like water on the skin. There is no stickiness to worry about.

After being disappointed with TOs Buffet serum and not seeing any results from other peptide creams (or collagen supplements/powders) and becoming a newfound fan of many of the products sold by COS RX, I decided to add their peptide serum to my skincare routine. I am absolutely thrilled with the results! From the first application, my skin felt noticeably smoother, plumper, and more hydrated, with results appearing very quickly. The serum absorbs quickly without leaving any sticky residue (its not like the snail products), making it perfect for layering under my serums and moisturizer.

After just a few DAYS of consistent use, I've noticed a significant improvement in the texture and firmness of my skin. Fine lines appear diminished, and my complexion looks more radiant and youthful. I love that it doesnt have any fragrance or harsh chemicals, making it suitable for my sensitive skin. Despite having rosacea and being acne-prone with sensitive skin, this product does not make my skin react angrily, which is a huge relief. It pairs great with the COS RX Essence. Its not moisturizing enough to use on its own for my dry skin, but it doesnt claim to be.