This lightweight, toner-like serum blends six powerful peptides to address fine lines, uneven texture, and loss of firmness. Suitable for all skin types, it absorbs instantly to boost elasticity, refine the appearance of pores, and leave skin smoother and stronger with every use.
As Featured In: Vogue recommends COSRX's peptide-packed formula as a go-to balancing face essence step to prep skin before makeup in "Want a Flawless Finish? Here's How to Prep Skin for Makeup" — helping balance and brighten the complexion without adding extra weight.
Size: 150mL (5.07 fl.oz)
| Concern | Suitable | Key Benefit | Key Ingredient |
|---|---|---|---|
| Fine lines & wrinkles | Yes | Firms and improves elasticity | 6 Peptide Complex |
| Loss of radiance | Yes | Boosts glow & vitality | Niacinamide |
| Uneven tone | Yes | Brightens and refines skin | Hyaluronic Acid, Peptides |
| Sagging skin | Yes | Visibly lifts and tightens | Peptide Blend, Adenosine | Rough texture | Yes | Smooths and refines surface | Peptides |
| Info | Details |
|---|---|
| Volume | 150mL |
| Key Ingredients | 6 multi-peptides with different effects, Hyaluronic Acid, N-Acetylglucosamine, Allantoin |
| Clinically Proven | Yes (Primary Skin Irritation Tested, Sensitive Skin Irritation Tested, Non-Comedogenic Tested on Acne-Prone Skin) |
| Expiration | 36 months from manufacturing or 12 months after opening |
| Allergens | Hypoallergenic tested |
| Feature | 6 Peptide Skin Booster | Typical Serum |
|---|---|---|
| Multi-peptide actives | 6 potent peptides for pores, sebum, firmness, tone, texture | Often 1–2 peptides or generic actives |
| Target concerns addressed | Pores/sebum, fine lines, texture, tone, soothing, hydration | Addresses only one concern |
| Texture | Lightweight, non-sticky, toner-type feel | Heavier or residue-leaving |
| Skin types | Suitable for all skin types, especially those with complex skin concerns | Caters to narrower skin types |
Clinically proven through independent skin science testing by the Dermacosmetic Skin Science Laboratory Co., Ltd for visible hydration and firmness results.
Clinically proven to deliver youthful, hydrated, and radiant skin.
increase in deep moisture
improvement in skin texture
boost in skin clarity
increase in radiance
improvement in density
Based on clinical trials of 20 subjects.As a result of the clinical trials from Dermacosmetic Skin Science Laboratory Co., Ltd (Sep 18 ~ Oct 31, 2023)
Perfect for anyone who wants one product to do it all, this serum targets firmness, pores, fine lines, dullness, hydration, radiance and uneven tone in a single step.
Formulated through non-comedogenic and primary irritation tests, it’s gentle enough for sensitive, acne-prone, or reactive skin types.
Designed for people looking to prevent early signs of aging while keeping the skin smooth, hydrated, and radiant.
Designed for easy layering, enhancing the affects of subsequent serums and ampoules when used before them.
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COSRX The 6 Peptide Skin Booster Serum works as the first step after cleansing to prep and awaken the skin. Its six multi-peptides, hyaluronic acid, and amino acids help improve texture, firmness, and hydration. It enhances the effects of subsequent products, making it an ideal all-in-one base for any skincare routine.
Visible improvements are typically observed after four weeks of consistent use. In clinical testing, 100% of participants reported smoother and more supple skin, with measured increases in hydration (+162.5%), texture (+76.4%), and clarity (+40.1%). Many users notice enhanced glow and softness within the first week of daily application.
Yes, the formula is designed for compatibility with other active ingredients. It layers well with Vitamin C, Retinol, Niacinamide, Ceramide, and Snail Mucin products to boost hydration, firmness, and radiance. Its low-irritation formula makes it safe for daily use, even in routines that include exfoliating acids or retinoids.
This peptide serum is a versatile starter that helps refine skin texture and boost overall skin health. Formulated with six carefully selected peptides, it supports hydration, brightness, density, radiance, clarity, and smoothness, working well with any next-step product.
Yes. Clinical studies from the Dermacosmetic Skin Science Laboratory confirm that the serum is safe for sensitive skin and suitable for acne-prone conditions. It is non-comedogenic and clinically proven, meaning it won’t clog pores or cause irritation, even with continuous use.
Apply the 6 Peptide Skin Booster Serum immediately after cleansing, as a toner before essence and thicker ampoule/serum. It acts as a hydration and prep step, enhancing the performance of following treatments like serums, ampoules, or creams. Use twice daily for optimal firmness, glow, and slow-aging benefits.
This serum is suitable for all skin types, including sensitive and acne-prone skin. It has been clinically tested for non-irritation and non-comedogenic properties, ensuring that it does not clog pores. It is ideal for those seeking a single first-step product that enhances firmness, smoothness, and glow while maintaining a healthy skin barrier.
Overall rating: 4.7003427 / 5 from 16045 reviews.
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"I have rephrased this several times and it will continue to do so! This product gives me noticeably hydration, glow and provides a solid base for the rest of my products. I do feel it gives my skin a youthful glow"
"The 6 peptide skin booster serum is amazing 👏. It hydrates and illuminates the skin, giving it a plump and radiant look. My skin has improved a whole lot from what it used to be."
"I purchased these product due to all the hype, but did not notice a significant improvement to my skin. I applied this product nightly prior to the snail mucin essence and moisturizer which I have used for years (and enjoyed), but I did not feel that this product added value to my skincare regiment considering the price. It did't make my skin worse, but I will not be repurchasing. Photo shows that I used about 1/3 of this bottle prior to determining my review."
"I love how lightweight this feels on the skin! It absorbs so quickly without any stickiness, so I can layer other serums with it, like the COSRX PDRN one."
"I ran out of this and thought I’d just use the cleanser, snail musin, and spray mist cream to save money; however, adding this prior to the snail musin makes my skin glow. I am 51 and see a difference when using it. Less visible lines also."
"I've noticed my skin is more hydrated. I use before the alpha arbutin serum and I like the effect. I haven't used it long enough to notice any additional benefits towards helping my hyperpigmentation, but my skin feels much better with less breakouts."
"I love this serum. I use it both mornings and nights. It is hydrating. Provides some brightening effect immediately after use. Keeps me glowing. Totally needed in your skincare routine"
"I love this toner it's my 2nd bottle I've purchased. I really appreciate how hydrating it is and that it has all of the peptides all in one bottle."
"Love this !! It has improve the glow of my skin. I used this everyday and I am not disappointed."
"This is the best skincare line I have ever used! Amazing improvement in my skin. Originally purchased to help with rosacea and it has definitely reduced redness and sensitivity but it has also completely changed my skin for the better: smaller pores, hydration, reduced lines and other signs of aging, i get compliments on my skin all the time!!!"
