Make your skincare routine blue | COSRX The Blue Peptide Bakuchiol Plump Glow Serum

Have you noticed that peptides, especially copper peptides, have become some of the most talked-about skincare ingredients lately? They’re nothing new, as blue peptide formulations have been on the market for a while. However, this year, COSRX decided to step up its peptide game by introducing a blue peptide duo: COSRX The Blue Peptide Bakuchiol Plump Bounce Cream and COSRX The Blue Peptide Bakuchiol Plump Glow Serum.

Disclosure: The products featured in this post were gifted by Stylevana, but all opinions expressed are my own.

Thanks to Stylevana, I had the opportunity to test COSRX The Blue Peptide Bakuchiol Plump Glow Serum. So, if you’re curious about this new launch, here’s everything you need to know before giving this serum a try.

Peptides in skincare

When we talk about peptides, we’re referring to a broad group of ingredients used in skincare. You’ve probably heard the most about copper peptides, as GHK-Cu is one of the best-known peptides in cosmetic formulations. Matrixyl 3000 (Palmitoyl Pentapeptide-4) and Argireline (Acetyl Hexapeptide-8) are also commonly discussed in skincare.

Peptides are short chains of amino acids linked together by peptide bonds. They can be classified in different ways, including by their length, the number of amino acids they contain, and their biological functions. Not all peptides are the same, and different types can have different roles in skincare.

In cosmetic science, peptides are often grouped into four broad categories according to their proposed mechanisms of action: signal peptides, carrier peptides, neurotransmitter-inhibiting peptides, and enzyme-inhibiting peptides.

Signal peptides communicate with skin cells and can influence processes involved in maintaining the skin's structure, including collagen and elastin production. Think of them as messengers that signal to skin cells, particularly fibroblasts, to support the production of these structural proteins. Signal peptides are especially popular in products designed to address visible signs of skin aging. Matrixyl 3000 is an example of a peptide complex commonly used for this purpose.

Carrier peptides bind to and transport trace elements, such as copper, which are involved in various biological processes. Copper peptides, including GHK-Cu, are examples of this group. Copper plays a role in processes related to skin repair and the maintenance of the extracellular matrix.

Neurotransmitter-inhibiting peptides are sometimes described as having a Botox-like effect because they are designed to interfere with the signaling processes involved in muscle contraction. Argireline is a well-known example. However, topical peptides do not work in the same way as injectable botulinum toxin, and their effects on expression lines are generally more limited.

Enzyme-inhibiting peptides are intended to inhibit the activity of enzymes involved in the breakdown of skin components, such as collagen and elastin. Certain peptides derived from rice and soy have been investigated for their potential enzyme-inhibiting properties, although their effects depend on the specific peptide and formulation.

Why is Copper Peptide so popular?

Copper peptides are not new to skincare. The Ordinary's “Buffet” + Copper Peptides 1% was introduced around 2017-2018, but this ingredient has become particularly popular lately. And not just in skincare.

I feel that the beauty industry is increasingly focused on trying out new ingredients and turning them into trends. Azelaic acid, ectoin, exosomes, NAD, PDRN, PDLLA, and even guaiazulene, which is actually making a comeback, have all attracted attention. On the one hand, it's exciting to see new research and renewed interest in different ingredients. On the other, it sometimes feels as though the industry is more interested in making products go viral than in developing genuinely innovative formulations. The PDRN trend, in particular, seems to have an almost endless lifespan.

Personally, I'm frustrated by how much skincare marketing has become focused on gimmicks and viral ingredients, while established brands with well-formulated, effective products struggle to gain traction in Western markets. Sometimes, it feels as though a trending ingredient matters more than the product itself.

However, I've noticed that the recent popularity of copper peptides on social media isn't always related to their cosmetic use. There's a grey area surrounding peptides, and I've even received Instagram messages offering injectable peptides for sale. This is where things become concerning.

Injecting unapproved or poorly regulated peptides from unknown sources can pose serious health risks. When you don't know where a substance comes from, whether it has been manufactured under appropriate quality standards, or what it actually contains, you're taking a significant risk. Many of these substances are research chemicals intended for laboratory use, not for human injection. Their safety, purity, dosage, and long-term effects may not have been adequately established.

The same concerns apply to Melanotan II, a substance promoted on social media for tanning despite significant safety concerns. Products sold online may have uncertain composition and quality, and Melanotan II is not an approved tanning medicine in many jurisdictions. The growing interest in these substances is closely linked to the biohacking movement, where people experiment with compounds marketed for their potential effects on the body, sometimes without sufficient evidence of safety.

It's important to distinguish injectable peptides from copper peptides used in skincare. Copper peptides such as GHK-Cu have a history of cosmetic use and are incorporated into topical formulations at controlled concentrations. When used as intended in properly formulated cosmetic products, they are generally considered a much lower-risk option than injecting unapproved substances from unverified sources. As with any cosmetic ingredient, irritation or individual sensitivity is still possible, and the safety of a finished product depends on its formulation and intended use.

Topical copper peptides and injectable research chemicals are not interchangeable. A serum containing copper peptides is not equivalent to injecting a peptide, and the safety data for one route of administration cannot be applied to the other. If you're interested in copper peptides, there's no need to turn to injections to explore their potential cosmetic benefits. Stick to properly formulated skincare products from reputable brands rather than risking your health with unapproved injectable substances.

Can I use Copper Peptide with vitamin C?

There’s no one-size-fits-all answer to this question, as we need to remember that some products contain LAA (L-ascorbic acid), also known as pure vitamin C, while others use vitamin C derivatives or combine different forms of vitamin C.

For example, COSRX does not recommend using its Copper Peptide serum together with vitamin C products. The main concern is potential ingredient stability and compatibility. Copper can participate in oxidation reactions, while L-ascorbic acid is sensitive to oxidation and is typically formulated at a low pH. Depending on the formulation, these factors may affect the stability of the ingredients, although there is limited clinical evidence showing how much this interaction affects their performance when applied to the skin.

Personally, I prefer to use one active at a time to keep my routine simple. You can use vitamin C in the morning and copper peptides in the evening. Vitamin C is particularly popular in morning routines because of its antioxidant properties, which can help complement the protection provided by sunscreen.

If you prefer to use both in the same routine, check the manufacturer's recommendations for your specific products. Waiting around 15 minutes between applications is sometimes suggested, but it does not guarantee compatibility or prevent potential stability issues. Keep in mind that this advice applies specifically to copper peptides and vitamin C, rather than to all peptides in general.

Can I use Copper Peptide with retinol?

The same goes for retinol and copper peptides. Some people say you can combine them, while others recommend against it. I’d suggest using copper peptides in your morning routine and retinol in the evening. If you prefer to use both in the same routine, you could leave about 15 minutes between applications, although this waiting time isn’t proven to be necessary for compatibility.

Meet the brand: COSRX

COSRX is a South Korean brand that you may know from the internet. It's a huge brand, and the beauty community loves COSRX products. COSRX was founded in 2013, and its name stands for COSmetics + RX (Prescription). The brand's motto is "expecting tomorrow," which reflects its philosophy of creating products that can improve your skin - not necessarily overnight, but in the long run. Many beauty bloggers love COSRX, and I think there are two main reasons why the brand has become so popular: the quality of its products and its affordable prices.

For me, COSRX was one of the first K-beauty brands I tried, and I still keep buying its Acne Pimple Master Patches. In the US, acne patches are much easier to find, but in Europe, getting them hasn't always been that easy. Fortunately, that's slowly changing.

Although COSRX is best known for its products for acne-prone skin, the brand generally keeps its formulas relatively simple and versatile. This means that even if you have dry skin, you may still find COSRX products that work well for you. It's also worth remembering that oily skin can become dehydrated, so products designed with oily or acne-prone skin in mind aren't necessarily unsuitable for dehydrated skin.

COSRX is a cruelty-free brand, which is another positive point for me. However, it's not a vegan brand because some of its products contain animal-derived ingredients such as snail mucin, beeswax, and propolis. In late 2023, Amorepacific acquired a controlling stake in COSRX, making COSRX a subsidiary of Amorepacific.

Lately, COSRX has expanded beyond skincare and now also offers products for hair and scalp care. The brand has established a strong position in the beauty market, and science and technology play an important role in its overall philosophy.

COSRX The Blue Peptide Bakuchiol Plump Glow Serum

A multi-action serum formulated with naturally blue-hued Copper Tripeptide-1. Combined with bakuchiol, it helps minimize the appearance of pores, smooth skin texture, and enhance the skin’s radiance. Its lightweight formula is suitable for sensitive skin.

COSRX The Blue Peptide Bakuchiol Plump Glow Serum - Packaging

I like COSRX’s design because the bottle fits seamlessly into the brand’s product line, even though the details come in a rich cobalt blue that matches the colour of the serum itself. I’m surprised to see some information in French and Norwegian in addition to English and Korean. Inside the box, you can also find instructions in all EU languages, although I’m not sure whether this is specific to the EU market or applies globally.

The serum comes in a large, blue-tinted glass bottle with a pipette cap featuring a slightly unusual shape. However, it works just as it should.

COSRX The Blue Peptide Bakuchiol Plump Glow Serum - Texture & Scent

The texture of COSRX The Blue Peptide Bakuchiol Plump Glow Serum is gel-like and lightweight, spreading easily across the skin. Its blue hue is natural and comes from Copper Tripeptide-1. Keep in mind that the colour may change over time due to exposure to heat and light. This is a natural process and doesn’t necessarily mean that the product has gone bad.

The serum has a clinical, ingredient-like scent. COSRX hasn’t added any colourants or fragrance ingredients to the formula.

Is COSRX The Blue Peptide Bakuchiol Plump Glow Serum vegan-friendly & cruelty-free?

Although COSRX doesn’t test products on animals, there’s no information if the brand is vegan-friendly and cruelty-free.

COSRX The Blue Peptide Bakuchiol Plump Glow Serum - Ingredients

Water / Aqua / Eau, Butylene Glycol, Glycerin, Dipropylene Glycol, Niacinamide, 1,2-Hexanediol, Betaine, Diethoxyethyl Succinate, Ammonium Acryloyldimethyltaurate/VP Copolymer, Dimethicone, Copper Tripeptide-1, Polyglyceryl-6 Caprylate, Polyglyceryl-4 Caprate, Bakuchiol, Hydrogenated Lecithin, Alcohol, Sodium Methyl Stearoyl Taurate, Ethylhexylglycerin, Hydroxypropyl Starch Phosphate, Disodium Edta, Adenosine, Caprylyl Glycol, Tocopherol, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Acetyl Hexapeptide-1, Acetyl Heptapeptide-4, Panthenol, Inositol, Acetyl Hexapeptide-8, Sodium Hydroxide, Propanediol, Beta-Glucan, Sodium Hyaluronate, Hyaluronic Acid, Sodium Hyaluronate Crosspolymer, Hydrolyzed Collagen, Hydrolyzed Hyaluronic Acid, Sodium Acetylated Hyaluronate, Acetyl Octapeptide-3

Water is typically listed in cosmetic products as "Aqua" or "Eau". It acts as a solvent, but it is not the same as ordinary drinking water. In skincare products, water must meet strict purity standards to ensure it is free from impurities, including minerals, microorganisms, and other contaminants. In most formulations, water makes up the largest proportion of the product. Butylene Glycol is a multifunctional ingredient commonly used in skincare and haircare products. It acts as a solvent and humectant, helping to dissolve ingredients while attracting moisture to the skin and hair. It can also enhance the penetration of active ingredients, improve a product's texture, and prevent formulations from drying out.

Glycerin, also known as Glycerol, is a humectant that helps attract and retain moisture in the skin. Depending on the product, it can be derived from natural sources or produced synthetically. It helps protect the skin from TEWL (transepidermal water loss), a natural process in which water evaporates from the skin's surface. Glycerin is one of the components of the NMF (Natural Moisturizing Factor), which plays an important role in maintaining skin hydration. It is also widely used in hair care products due to its moisturizing properties. Glycerin is generally considered non-comedogenic and is unlikely to clog pores. Rather than irritating the skin, it can help support the skin barrier and reduce the feeling of dryness and irritation. Dipropylene Glycol is a multifunctional ingredient commonly used as a solvent in skincare formulations. It helps dissolve other ingredients, improve product texture, and provides moisturizing benefits by helping the skin retain hydration.

Niacinamide is a form of vitamin B3, a water-soluble vitamin. It helps address issues such as wrinkles, acne, uneven skin texture, and enlarged pores, while promoting collagen synthesis. Niacinamide makes the skin barrier stronger. It might be handy in cellulite treatments. Do you want to fight pigmentation or uneven skin? Try mixing niacinamide with Kojic Acid, Arbutin, Vitamin C, Tranexamic Acid, or Retinol. 1,2-Hexanediol is a synthetic solvent and preservative booster. It helps protect products from microorganisms by enhancing the effectiveness of other preservatives. It also has humectant properties, helping to keep the skin hydrated, and is generally well tolerated by the skin.

Betaine is an amino acid derivative that is widely used in skincare products for its moisturizing properties. It helps maintain the skin’s water balance, making the skin appear smoother and helping fine lines and wrinkles look less visible. Betaine also has soothing properties, which makes it beneficial for irritated or sensitive skin. In hair care, betaine does more than just moisturize the hair. It helps improve softness, smoothness, and shine, leaving the hair looking healthier. The betaine used in cosmetics is often derived from sugar beets. It is also a naturally occurring compound found in the skin and hair. Diethoxyethyl Succinate is an emollient that helps soften and smooth the skin while giving the product a pleasant texture.

Ammonium Acryloyldimethyltaurate/VP Copolymer is a synthetic polymer primarily used as a thickening and stabilizing agent. It helps create a smooth, pleasant texture and improves the consistency of cosmetic formulations. Dimethicone is a silicone-based polymer that helps smooth and soften the skin while creating a protective barrier that reduces moisture loss. Copper Tripeptide-1 is a peptide made up of three amino acids -  glycine, histidine, and lysine - combined with copper. It may support collagen and elastin production and is also involved in skin repair and wound healing, making it an interesting ingredient for acne-prone skin. Copper Tripeptide-1 also has antioxidant properties and may help support hair growth and reduce hair loss, although more research is needed to confirm its effectiveness for hair-related concerns. Polyglyceryl-6 Caprylate is a non-ionic surfactant and emulsifier. It helps blend ingredients that normally do not mix well, such as oil and water, while also helping to stabilize the formula. 

Polyglyceryl-4 Caprate is a non-ionic surfactant and emulsifier. It helps blend oil- and water-based ingredients and keeps the formula stable. It can also help cleanse the skin by helping remove oil and impurities. Bakuchiol is a plant-derived ingredient often marketed as a “phyto-retinol” or a natural alternative to retinol. It is obtained mainly from the seeds of Psoralea Corylifolia, also known as Babchi. Bakuchiol has antioxidant, anti-inflammatory, and antimicrobial properties and is used in skincare for its anti-aging benefits. Bakuchiol is considered an alternative to retinol because research suggests that it may help improve the appearance of fine lines, wrinkles, uneven skin tone, and other signs of photoaging through some similar pathways. However, bakuchiol is chemically different from retinol and should not be considered a retinoid. Unlike retinoids, bakuchiol is not known to cause photosensitivity, although sunscreen is still essential when using it as part of an anti-aging routine. It is also generally considered gentler and may be a good option for people with sensitive skin. However, there is not enough safety data to recommend bakuchiol as definitively safe during pregnancy, so pregnant or breastfeeding individuals should consult their healthcare professional before using it. Bakuchiol may also help support collagen production and reduce processes involved in collagen degradation, which can contribute to improved skin firmness and elasticity.

Hydrogenated Lecithin is a version of lecithin. It works as an emollient in the formulas. Alcohol is a complex and often misunderstood ingredient in skincare. Whether it is beneficial or harmful depends on the type of alcohol, its concentration, and the overall formulation. As the saying goes, the dose makes the poison. Alcohol is an effective solvent that helps dissolve certain ingredients and can enhance the penetration of active substances into the skin. However, this increased penetration may also cause irritation, especially in sensitive skin. Some cosmetic ingredients can only be dissolved in alcohol, making it an essential component of certain formulations. In addition, alcohol has antimicrobial properties, allowing it to act as a preservative by helping prevent the growth of microorganisms in a product. On the downside, high concentrations of certain types of alcohol can strip the skin of moisture, leaving it dry and irritated. For this reason, products containing large amounts of drying alcohols may not be the best choice for people with sensitive or very dry skin.

Sodium Methyl Stearoyl Taurate is a surfactant that helps cleanse the skin by removing oil and impurities. It can also help increase the viscosity of a formula and improve its texture and stability. Ethylhexylglycerin is a multifunctional ingredient used as a preservative and preservative booster in cosmetic formulations. It has mild moisturizing and antimicrobial properties, helping to keep products stable while supporting the effectiveness of other preservatives. Hydroxypropyl Starch Phosphate is a modified starch that works primarily as a thickener and stabilizer. It helps improve the texture and consistency of cosmetic formulas and can also contribute to keeping the ingredients evenly dispersed. Disodium EDTA is a chelating agent that neutralizes metal ions, preventing them from destabilizing the formula or accelerating oxidation. This helps maintain the product's stability, effectiveness, and shelf life.

Adenosine naturally occurs in the skin and plays several roles in the body, including acting as a neurotransmitter. In skincare, it is valued for its anti-wrinkle and soothing properties. Adenosine has anti-inflammatory benefits, may support collagen production, and can help improve the appearance of fine lines, redness, and irritation. In hair care, adenosine is used in products designed to support hair growth and help reduce hair loss. Caprylyl Glycol is a multifunctional ingredient with emollient and humectant properties. It helps keep the skin hydrated, improves the texture and feel of cosmetic formulations, and can contribute to a smooth, soft finish on the skin.

Tocopherol is an antioxidant commonly known as Vitamin E. It is a fat-soluble vitamin that helps protect the skin from free radical damage and supports the skin's natural lipid barrier. It can also work synergistically with Vitamin C to boost antioxidant protection. Vitamin E may provide some photoprotective benefits, but it is not a substitute for sunscreen. Despite common claims, it does not act as a preservative or significantly improve scars. While some Vitamin E-rich formulations may feel too heavy for oily or acne-prone skin, Tocopherol itself is not universally considered pore-clogging. Dipeptide Diaminobutyroyl Benzylamide Diacetate might sound like a complicated ingredient, but you probably know it as Syn-Ake™. It's a synthetic peptide inspired by a peptide found in temple viper venom and is marketed for its Botox-like effect. Some people even call it "Botox in a jar." It is designed to help relax facial muscles and reduce the appearance of expression lines and wrinkles.

Acetyl Hexapeptide-1, also known as Melitane™, is a biomimetic peptide that mimics the activity of α-melanocyte-stimulating hormone (α-MSH). It stimulates melanin production and is therefore used in some skincare products targeting pigmentation as well as haircare products designed to help address premature graying. It is also reported to have antioxidant and photoprotective properties, which may help protect the skin from oxidative stress and environmental damage caused by UV radiation. Acetyl Heptapeptide-4 is a synthetic peptide with moisturizing properties. It may help improve the skin's hydration and support a smoother, more supple appearance.

Panthenol, also known as vitamin B5, is a humectant that helps retain moisture and reduce transepidermal water loss (TEWL). It has soothing and anti-inflammatory properties, supporting the skin barrier and helping with irritation and the healing process. It is especially useful for sensitive or damaged skin, including after sun exposure. In haircare, panthenol helps hydrate, soften, and improve hair manageability. Inositol is sometimes referred to as "Vitamin B8," but this is actually incorrect. Inositol can be synthesized by the human body, whereas vitamins, by definition, cannot be produced in sufficient amounts by the body and therefore need to be obtained from the diet. Since inositol is not a vitamin, "Vitamin B8" is simply a common but misleading name. Inositol has hydrating properties and may also play a role in maintaining healthy hair.

Acetyl Hexapeptide-8 is a synthetic peptide, also known as a biomimetic peptide or “neuropeptide.” It has been heavily marketed by cosmetic brands as a “Botox-like” ingredient, but it’s important to remember that it does not produce the same effects as Botox. Acetyl Hexapeptide-8 is designed to target the appearance of expression lines and wrinkles associated with repetitive facial movements. It is thought to interfere with the SNARE complex involved in neurotransmitter release, which may reduce muscle contraction signaling and, as a result, help make expression lines look less noticeable. It also has skin-conditioning and water-binding properties, which may help improve the skin’s hydration and overall appearance. While some research suggests that peptides such as Acetyl Hexapeptide-8 may have additional effects on skin structure, its most established cosmetic use is targeting the appearance of fine lines and wrinkles. You may also see Acetyl Hexapeptide-8 marketed under the trade name Argireline®. Acetyl Hexapeptide-3 is an older name associated with the same peptide.

Sodium Hydroxide is a pH adjuster commonly used in skincare formulations. It helps balance the pH of products to ensure stability and maintain skin compatibility. Propanediol, also known as a natural glycol, is a humectant and solvent commonly used as an alternative to propylene glycol. It helps dissolve ingredients, improves the texture and spreadability of formulations, and provides additional moisturizing benefits by attracting water to the skin. It can also enhance the delivery and performance of certain active ingredients.

Beta-glucan is a polysaccharide that can be derived from sources such as yeast, seaweed, and fungi. It is a powerful humectant with soothing and skin-conditioning properties, helping to attract and retain moisture in the skin. By forming a protective film on the skin's surface, beta-glucan helps reduce transepidermal water loss (TEWL) and supports a healthy skin barrier. It may also help improve the appearance of fine lines by keeping the skin hydrated and plump. Some studies suggest that beta-glucan has antioxidant properties as well. Thanks to its soothing and barrier-supporting benefits, beta-glucan pairs well with ingredients such as niacinamide and retinoids and can be useful after cosmetic treatments when the skin needs extra support.

Sodium Hyaluronate is the sodium salt form of hyaluronic acid and a naturally occurring component of the skin. It has excellent water-binding properties, helping to attract and retain moisture for long-lasting hydration. By supporting the skin’s moisture balance, sodium hyaluronate helps maintain a plump and healthy-looking complexion. It can also form a lightweight moisturizing film on the skin’s surface and improve the stability of skincare formulations by preventing them from drying out. Hyaluronic Acid is an ingredient loved by many skincare enthusiasts. It naturally occurs in the skin, where it belongs to a group of molecules called glycosaminoglycans (GAGs). In simple terms, it is a long polysaccharide made of sugar molecules, which allows it to attract and hold water. Like other humectants, hyaluronic acid helps maintain skin hydration by binding moisture. One molecule of hyaluronic acid can hold up to 1,000 times its weight in water. Hyaluronic acid is available in different molecular weights - smaller molecules can penetrate the skin more easily, while larger molecules mainly work on the skin’s surface, helping to reduce moisture loss and keep the skin hydrated.

Sodium Hyaluronate Crosspolymer is a cross-linked derivative of sodium hyaluronate. It forms a three-dimensional network that helps bind and retain water on the skin, providing long-lasting hydration. It acts as an effective moisturizer and can help reduce transepidermal water loss (TEWL) by creating a protective, hydrating layer on the skin's surface. Hydrolyzed Collagen is a low-molecular-weight form of collagen used as a humectant and film-forming ingredient. It attracts and retains water on the skin's surface, helping maintain hydration and reduce moisture loss. In hair care formulations, it improves conditioning properties, enhances smoothness, and helps with detangling.

Hydrolyzed Hyaluronic Acid is a lower-molecular-weight form of hyaluronic acid that acts as a humectant. Thanks to its smaller molecular size, it can penetrate the upper layers of the skin more effectively than high-molecular-weight hyaluronic acid, helping to deliver moisture where it is needed. It is a naturally derived polymer that binds water, helps maintain skin hydration, and reduces transepidermal water loss (TEWL). Sodium Acetylated Hyaluronate is a modified form of Sodium Hyaluronate with moisturizing and skin-conditioning properties. It helps increase skin hydration, improve its suppleness and elasticity, and reduce transepidermal water loss (TEWL). Acetyl Octapeptide-3, also known as SNAP-8™, is a synthetic peptide with a Botox-like effect. It is designed to help reduce the appearance of fine lines and wrinkles associated with repetitive facial muscle movements. Some sources suggest that it may be more effective than Acetyl Hexapeptide-8 (Argireline®), but there is limited independent clinical evidence to support the claim that it is definitively stronger.

How to use COSRX The Blue Peptide Bakuchiol Plump Glow Serum?

Apply after toner, using an adequate amount and gently tapping it into the skin. Avoid the eye area. Do not use it in the same routine as vitamin C products.

How does COSRX The Blue Peptide Bakuchiol Plump Glow Serum work?

Let's be honest: I still need to give this serum a longer trial, so once I finish the bottle, I’ll update this review with my long-term impressions.

COSRX The Blue Peptide Bakuchiol Plump Glow Serum is designed to address several skin concerns associated with aging, including the appearance of pores, uneven skin texture, dark spots, skin barrier support, and hydration. Since it targets so many different concerns, I think it deserves more time before I can properly evaluate its performance.

Recently, I haven't been using vitamin C or retinol because I underwent a laser treatment to remove sebaceous hyperplasia, a condition that can be quite difficult to address with acids or topical skincare products alone. I wanted to be extra careful with active ingredients both before and after the treatment, so I decided to keep my routine relatively gentle.

Instead, I started using COSRX The Blue Peptide Bakuchiol Plump Glow Serum, as I thought it would be a gentler option for my skin during this period. The texture is lovely, and its distinctive blue colour reminds me of the Klairs Blue Drops serum, which I also enjoy. However, the two products achieve their blue appearance through different ingredients. Klairs uses EGF and guaiazulene, while COSRX uses Copper Tripeptide-1, a copper peptide that also gives the formula its characteristic blue hue.

Have I noticed any significant changes over time? It's still too early to say, and I'll have to revisit this review once I've finished the bottle. My first impression is positive, particularly when it comes to hydration. My skin feels moisturized almost immediately after application, and I really enjoy the serum's texture.

Overall, I think this product has potential, but I need more time to assess its actual effects. This is especially true when it comes to pigmentation and dark spots, as these concerns generally require consistent use and several weeks, or sometimes months, before visible improvements can be evaluated. For now, I'm happy with the initial hydration boost, but I'll reserve my final verdict until I've had the chance to use the serum for longer.

COSRX The Blue Peptide Bakuchiol Plump Glow Serum - Skin Compability

COSRX The Blue Peptide Bakuchiol Plump Glow Serum is a good option for mature skin and anyone looking to address the early signs of aging, including dark spots and the appearance of enlarged pores. Its hydrating formula may be particularly appealing to those with dry or dehydrated skin, but it works well on my combination skin, too. The lightweight texture provides an immediate boost of moisture without feeling overly heavy, making it a product worth considering for different skin types.

COSRX The Blue Peptide Bakuchiol Plump Glow Serum  - Pros & Cons

Pros:

+ Lightweight, pleasant texture

+ Provides an immediate boost of hydration

+ Suitable for combination skin

+ May appeal to mature skin and those concerned with early signs of aging

+ Contains Copper Tripeptide-1 and bakuchiol

Cons:

- Long-term effects on pigmentation and enlarged pores require further evaluation

- May not be sufficient as a standalone treatment for more pronounced signs of aging

- Results may take time and consistent use to become noticeable

COSRX The Blue Peptide Bakuchiol Plump Glow Serum - Alternatives

If you're looking for alternatives, Dr.Reju-All Advanced PDRN Copper Peptide Serum combines 1,200 ppm of PDRN with copper peptides described as having 99% purity. Another interesting option is Abib Copper Peptide Serum Bouncing Drop, which combines 0.1% copper peptides with Matrixyl, a complex of 12 types of peptides, ceramides, and ectoin.

You could also consider Dr. Althea Blue Peptide Bounce Serum, which combines 0.6% Copper Tripeptide-1 with 5% Volufiline™ and collagen. Each of these serums offers a different combination of ingredients for those looking to incorporate copper peptides into their anti-aging skincare routine.

How much does COSRX The Blue Peptide Bakuchiol Plump Glow Serum cost and where to find it?

The regular price for COSRX The Blue Peptide Bakuchiol Plump Glow Serum is $27/50 ml but currently you can get it for $18.90/50 ml. You can also use my code INF10BETW to get an additional discount on your Stylevana purchase.

Overall, COSRX The Blue Peptide Bakuchiol Plump Glow Serum is an interesting option for those looking to add copper peptides to their skincare routine, especially if they prefer lightweight formulas. While it may be worth considering for improving the appearance of skin texture, enlarged pores, and early signs of aging, consistent use is key, and the results will depend on individual skin needs. If you're looking for a peptide-based serum that offers hydration while complementing an anti-aging routine, this formula is worth considering.

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