The LS5 Copper Serum delivers advanced renewal through Dual Liposome Delivery. A 2% GHK-Cu Copper Peptide infusion revitalizes skin, while our LS5 Collagen Complex of five peptides reinforces collagen. Suspended in a hydrating base of 5% Urea, 2% Ectoin, and advanced penetration enhancers for maximum absorption.
Our Signature LS5 Complex
- 2% GHK-Cu Copper Peptides liposome-encapsulated that rejuvenates skin by safely delivering copper, boosting collagen and elastin, balancing matrix turnover, and enhancing renewal, improving wrinkles, firmness, texture, and radiance.
- 5% LS5 Collagen Peptide Complex a next-generation collagen peptide complex that renews and organizes the skin’s extracellular matrix, rebuilding firmness, density, and resilience while visibly reducing wrinkles and restoring youthful texture.
- 5% Hydroxyethyl Urea delivers fast, deep, and lasting hydration while strengthening the skin barrier, smoothing roughness, and restoring soft, supple comfort
- 2% Ectoin a natural extremolyte, protects skin from environmental stressors such as pollution, heat, and dehydration. It deeply hydrates and helps restore the skin barrier.
- Dimethyl Isosorbide & Ethoxydiglycol An advanced blend of penetration enhancers, help fluidize the skin’s surface, allowing liposomes to glide through more easily and deliver actives precisely where they are needed.
Aroma: Fragrance free
Suited To: Suitable for all skin types including dry, and mature skin types.
Ingredients List
Ingredients List
Our formulation includes the following key ingredients:
Water/Aqua, propanediol, hydroxyethyl urea, cyclopentasiloxane, dimethyl isosorbide, ehtoxydiglycol, isostearyl isostearate, copper tripeptide-1 (ghk-cu), ectoin, lecithin, cyclohexasiloxane, peg-20 methyl glucose sesquistearate, gluconolactone, propylene glycol caprylate, methyl glucose sesquistearate, sodium benzoate, microcrystalline cellulose, sphingomonas ferment extract, caprylic/capric triglyceride, allantoin, sodium hydroxide, cellulose gum, palmitoyl tripeptide-38, palmitoyl tripeptide-4, palmitoyl tripeptide-5, acetyl tetrapeptide-9, tripeptide-10 citrulline, calcium gluconate, helianthus annuus (sunflower) seed oil, tocopherol.
Dual Encapsulation Technology
Formulated with the regenerative power of GHK-Cu, our serum delivers six unique collagen peptides through dual-encapsulation technology - designed for maximum skin absorption. Housed in a moisturising complex with 5% Urea AND 2% Ectoin, it boosts barrier hydration and enhances active delivery for deeper, more effective skin renewal.
Precision Delivery. Maximum Absorption.
Our unique anti-aging formulation is developed to target the visible signs of collagen loss—firmness, fine lines, and skin fatigue. By combining GHK-Cu copper peptides with a synergistic blend of four collagen-stimulating peptides, the LS5 Matrix works to visibly renew and reinforce the skin’s structure. The dual-encapsulation delivery system ensures these potent actives remain stable, penetrate deeply, and work precisely where they’re needed—helping to restore elasticity, smooth texture, and support long-term skin rejuvenation.
Tripeptide-10 Citrulline
A breakthrough peptide mimicking decorin,
refining collagen into finer, evenly spaced fibers that
fortify skin’s structure for youthful resilience.
Acetyl Tetrapeptide-9
Stimulates lumican, the master pattern-maker of collagen I.It not only boosts collagen production, but ensures fibers are woven neatly and tightly, redensifying skin with strength and smoothness.
Palmitoyl Tripeptide-38
sends a surge of renewal signals to fibroblasts, boosting collagen, laminin, fibronectin, and hyaluronic acid all at once—plumping, smoothing, and strengthening skin’s foundation for lasting firmness and youthful volume.
How to Use
Apply a small amount to palms, smooth evenly, and gently massage until absorbed.
When To Apply
Vitamin C and certain chemical exfoliants (such as AHAs) can deactivate copper peptides. If Vitamin C is part of your morning routine, apply LS5 Copper Peptides at night. If you use exfoliants in the evening, alternate nights with LS5 or shift your exfoliants to the morning if the formulation allows.
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Cleanse
Step 1
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Toner
Step 3
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Serums
Step 4
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LS5 Copper
Step 5
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Hydrate
Step 6
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Face Oil
Step 7
Features
We are proud and grateful to have our brand featured in some of Australia's most beloved editorials.
FAQ
Learn More About Our Amazing Serum
Can you use Copper Peptides with Retinoids including Tretinoin?
Can you use Copper Peptides with Retinoids including Tretinoin?
There are no clinical studies that have tested the efficacy of Copper Peptides when paired with retinoids.
Copper peptides are quite stable, but can deactivate in the following situations -
- In the presence of strong chelating agents.
- In the presence of strong oxidizers/peroxidzers
- In the presence of extremly Low or high pH conditions.
Retinoids are are usually formulated between a pH of 4.5-5.5, and are not considered
Customer Reviews
Overall rating: 5.0 / 5 from 90 reviews.
I’ve almost finished my first bottle and am buying a second. I usually have decent skin but I think this has made it even better
Recently purchased the LS5 Copper Peptide Serum. I am so impressed. Definite repurchase. Highly recommend. Leitin was was very helpful. Customer service is amazing.
Store owner replied: Thank you so much Lisa for your lovely review! We’re thrilled to hear you’re loving the LS5 Copper Peptide Serum and that it’s earned a spot in your repurchase list! Your kind words about our customer service mean so much to us, too. Thank you for your support and recommendation we truly appreciate it! Leitin team x
This serum is so amazing. Can't wait to see more results as time goes by
Store owner replied: Hi Ashlee, Your skin looks amazing! Thanks so much for taking the time to review the LS5 Copper Peptide Serum. xx
First of all, this was my first order from LEITIN. One day I found LEITIN through TIK TOK influencers talking about this Brand. I have used The ordinary copper peptide& NIOD however it didn’t made me feeling use it for long time. I heard so many benefits of copper peptide but always struggled to find good brand which I can afford for long term. LEITIN copper peptide seems really promising. I liked everything when I use it, very hydrating and smooth feeling when I use it. Unfortunately I had to stop using it for couple of weeks because I completely damaged my skin using other activities but once my skin gets better I will start using it again❤️
Store owner replied: Thank you so much for giving Leitin a try and sharing your experience! We’re so happy to hear you’re loving the hydrating, smooth feel of our Copper Peptide Serum. We completely understand needing to pause your routine while your skin recovers, so take your time and be gentle with your skin. We’ll be here whenever you’re ready to reintroduce the serum! Reach out if we can help with anything. Thank you for your support and trust in Leitin. xx
As an almost 53 year old, I've virtually used every formulation of Copper Peptides on the market. To me, this is comparable with the best (Medik8 Advanced Peptides MP in the black bottle) BUT WITH A MAJOR DIFFERENCE. This serum lasts a lot longer, I also think it's slightly stronger (I'm on my second bottle, so I've tried it for over 3 months without altering anything else) and I've seen fantastic improvement. I've got very high standards for Copper Peptides as I think they are just as important as retinol/tret when you get to the over 40 range, and this has proved to be exceptional. As is everything else I've tried so far (Vitamin C, Holy Oil, Eye Cream) and can't wait to try more. Love that it's an Aussie formulator too💖
Store owner replied: Hi Michelle, Thank you so much for this incredible and thoughtful review! It means so much to hear such positive feedback from someone with your experience using copper peptides. We’re thrilled that you’ve seen such fantastic improvements over the past three months and are loving not only the serum but our other products too! Your support for an Australian-formulated brand makes it even more special. Thank you for trusting Leitin with your skincare journey, we can’t wait for you to discover more! 🇦🇺✨xx
I was so excited to receive this product. I did a lot of research on this and what formulation and other companies use. Top quality 💕💕💕💕 Highly recommend
Store owner replied: Hi Tracy, Thank you so much for your wonderful feedback! We love hearing that you’ve done your research and are so impressed with the quality of our formulation. We put so much care into our products, so it means a lot to know that it shows. Thank you for your support and recommendation! Leitin team x
I didn’t realise how quickly I’d see results from this! Within two weeks of consistently using it my skin feel smoother and more clear! This has been a game changer for me I’m obsessed
Store owner replied: Hi Danielle, We love hearing how much of a difference the LS5 Copper peptide Serum, and the Resurrect night cream has made to your routine! It’s fantastic that you’re already noticing smoother, clearer-looking skin after just two weeks of consistent use. Finding a product that makes you feel this good about your skin is so special, and we’re thrilled it’s become a favourite. Thank you for sharing your excitement with us! Leitin Team x
Have been using for a few weeks and have noticed skin is feeling softer. Easy to apply with pump nozzle. Other products seem to absorb better when applied after this.
Store owner replied: Hi Jodie, Thank you for sharing your experience! We’re pleased to hear you’re already noticing softer skin after a few weeks of use. It’s great to know the pump packaging makes application easy and that the product fits so well into your routine, helping your other skincare layer comfortably afterwards. We appreciate you choosing Leitin and look forward to hearing how you get on! Leitin Team x
I've tried a lot of copper peptides serums. I'd rate this one as number 1 alongside Medik8 Liquid Peptides Advanced, BUT you need to use less of it. It has produced great results and my skin feels fantastic! Really happy with it. Fantastic serum!
Store owner replied: Hi Michelle, Thank you for such a fantastic review! It means a lot to hear that, after trying so many copper peptide serums, Our LS5 has earned a top spot in your routine. We’re delighted you’re seeing great results and that your skin is feeling so good. And thank you for the helpful tip about using a smaller amount, a little can go a long way! We really appreciate you sharing your experience and choosing Leitin. Leitin Team x
I use it with micro needling. Take’s redness out and gives a great light feeling. I’ll buy it again.
Loving ghk-cu Easy glide serum Feel it being an active but not in a bad way Just a "hey I'm here" feeling Non reactive Non irritating Skin absorbs it well Looking forward to results in a couple of months Can already hear my skin thanking me
I was excited to try your copper peptide. With clams of stimulating collagen synthesis, improving elasticity, and reduceing wrinkles. I have found it difficult to know when to apply, due to it reacting with other products, so I apply it at night, and use a clear toner prior to use. I have found it works well on my face, but not as effective on my neck area. The metalic smell is interesting and lingers. Hopefully this is helpful
Absolutely love this product ! This will be part of my skincare routine for as long as you make it . Wonderful Job Thank you so much ❤️
This product has been a game changer for my skin, I’ve found my Holy Grail this and the vitamin C, I’m not looking around for other products any more!
I stumbled across this brand on TikTok and was instantly intrigued by this serum, so I decided to order it. I’m so glad I did! The packaging is stunning, and the product itself? Gorgeous! It goes on easy, settles into the skin quickly and though I’m only 3 weeks in using this serum, my skin seems to be responding really well to it and it feels lovely and soft when I wake up. This is by far best copper serum I’ve used.
TBH, I was a little reluctant at first with the cost, however after doing my own research - decided to take the plunge. I'm so glad I did, not only am I supporting an Australian Company, but this product is transforming my skin. Its calmed my skin, particularly the redness I have, my skin is firmer and I'm seeing an improvement in skin texture.
Beautiful product.. Feels lovely on the skin. My skin feels slightly tighter.
I love LS5 Copper Peptide. In face love everything from Leitin. I went for a facial the other day and was told that my skin texture was amazing [I'm 59), will always continue to use his products
Store owner replied: Thank you so much for this beautiful review! We’re absolutely thrilled to hear how much you’re loving LS5 Copper Peptide and the rest of the Leitin range! What a lovely compliment to receive during your facial, we’re so happy your skin is looking and feeling amazing! Thank you for your continued support and for being part of the Leitin family
I’m really enjoying this serum. I have used it every single day since I’ve gotten it. It fits perfectly in my routine, the texture is fantastic. I’m excited to see results with continued use.
Store owner replied: Thank you so much for sharing your experience! We’re so happy to hear you’re loving the serum and that it’s slotted seamlessly into your daily routine. There’s nothing better than a texture that feels just right! We can’t wait for you to see how your skin continues to respond with consistent use.
This is my second bottle and my skin drinks it up. I can definitely feel the difference, even after washing my face in the morning! I had a facial at a very well known aesthetics business and they scan your face before any treatment starts. She said she had to do it twice as my skin was extremely hydrated , especially after cleansing. I also use waterbomb and I'd say the 2 together have made a huge difference!
Store owner replied: Wow, we absolutely love hearing this! Thank you for sharing such wonderful feedback, and for coming back for your second bottle! It’s amazing to hear how much you’re loving the hydration, especially paired with Waterbomb. We’re so happy your skincare routine is working so beautifully for you, and we truly appreciate your continued support!
The best serum! So lightweight, yet instantly feels nourishing and luxurious on the skin. I’m already on my second bottle, with a third in my backup stash! This is the serum my skin craves and I can feel the quality from the moment I apply it. I’m 48 years old and since using Leitin products, my skin has never looked or felt better. I couldn’t recommend this serum more highly!
Store owner replied: What a beautiful review! We love that you’re already on your second bottle with a third waiting in the wings! There’s nothing better than finding that one serum your skin just loves. We’re so happy Leitin has become such a special part of your routine and that your skin is looking and feeling its best. Thank you so much for your incredible support and recommendation!
I'm new to copper peptides and this has strong actives, so I'm only applying it at night every three days and not yet getting the full effects--but immediately after applying, my face looks healthier! And when I wake up in the morning, it still looks healthier. The serum is very light and dries quickly and completely--no sticky/tacky residue. It has a slightly coppery smell which I'm glad for because that tells me it's the real deal. I can feel a slight tingling at first. Not irritating, just enough to tell me that there are some serious actives going right to work! I imagine as I become accustomed to it, that feeling might go away. I've only had one other serum make my face look instantly healthier, but it was too expensive to repurchase and I want to afford to eat. I've researched copper peptide serums for months and decided to give up because there was nothing out there that was affordable with strong-enough actives to make it worth the money--until I stumbled across Leitin! I seriously love this serum despite not knowing yet what the long-term improvements to my skin might be. I can't wait to work up to the day when I can start using it every night. This is the first product I've ever used where I have faith instead of doubts on its ability to improve my skin over time. I hope I can edit my reviews so I can return to this one after a while to share more insights on is effectiveness. Thank you, Leitin! I will definitely be a returning customer. I'm so grateful to you, your science, your hard work, and your willingness to make this more affordable (and with better ingredients!) than other competing copper peptide brands!
Store owner replied: Hi Sally, Thank you so much for your incredible support and thoughtful review! We're thrilled you're loving the serum and already noticing a healthy-looking glow. We truly appreciate your trust in Leitin and are so happy to make effective skincare more accessible. Remember to listen to your skin and introduce actives at a pace that feels comfortable. We can't wait to hear about your journey! x
This is my favorite copper peptide. I’m on my second bottle and incorporate it daily, in my nightly skincare routine.
Store owner replied: HI Colette, Thank you for taking the time to review the LS5 Copper Peptide Serum. Super Glad You're enjoying it
I am from Canada, I had to pay a lot for shipping which put this at almost $200 Canadian dollars. I do love the packaging, weight of it feels lux. The serum is a beautiful blue and I love the extra ingredients in the Copper peptide serum. I have only had it for 2 weeks but I love how it applies and feels. Leitin is THE reason I purchased this product, I love how hands on he is and how much care he puts into his products. Results are TBD. ❤️
Store owner replied: Hi Carla, Thank you so much for your thoughtful review and support! We're thrilled you're loving the packaging, formula, and application experience. We truly appreciate your trust in Leitin and your patience as you discover the serum. We look forward to hearing about your results over time!
Of all the copper peptide serums I have tried this is by far the best one. The whole experience from the packaging and information about the product down to the texture and feel of it, AMAZING! The added barrier ingredients was also a huge factor in buying. This will be a nonstop fill for me! Oh and I’m from America so even with shipping costs t doesn’t matter to me! Leitins products are worth it. And his swiftness and customer service is exceptional ❤️
Store owner replied: Hi Sean, Thank you so much for your amazing support! 💙 We're thrilled you're loving every aspect of the serum, from the formula to the packaging. It means the world to us that you trust Leitin and his products so much. Your kind words about the customer service truly mean a lot, and we're so grateful to have you as part of the Leitin community!
The best copper peptide serum on the market!
Store owner replied: Hi Joanna, Thanks for the review It sure is an amazing Product. xx
Lovely product as are all of Leitin products and will be a regular purchaser. We just need some facial mists now to add to the collection :)
Store owner replied: Thank you so much for your lovely support! We’re thrilled to hear you’re loving our products and that you’ll be shopping with us again. I love the idea of a facial mists! I'll be sure to pass your suggestion along to Leitin. Thank you for being part of the Leitin family. xx
Lovely product and packaging. Definitely a repurchase!
Store owner replied: Hi Lee, Thanks so much for leaving a review for the LS5 Copper peptide Serum. So glad you're loving it as much as we do!
I’m not kidding but the results I am seeing this early are incredible. The serum is a delight to put on and I will forever purchase this product.
Store owner replied: Hi Kelly, So happy to hear you're seeing results super early! Love xx
The serum is lovely to use! Copper peptides has been and always will be part of my routine along with long term use of tret and peptides to maintain my skin quality. Glad I found this quality serum in AU and has replaced the Platinum CP serum.
Store owner replied: Thank you so much for your lovely review! We’re delighted to hear that you’re enjoying the serum and that it has earned a place in your long-term skincare routine. It’s wonderful to know you’ve found a quality copper peptide serum here in Australia that you love. Thank you for your support x
Love this ! I have noticed a difference in my skin. Onto my third bottle now
Store owner replied: Thank you so much for your lovely feedback! We’re thrilled to hear you’re noticing a difference in your skin and that you’re already onto your third bottle! Thank you for your continued support and for making us part of your skincare routine! xx
Love this serum- my skin is hydrated and plump/ will be re purchasing forever! Need to try the other products I feel they will be just as amazing!
Store owner replied: Thank you so much for your wonderful review! We’re thrilled to hear your skin is feeling hydrated and plump, and we’re so grateful for your continued support! We can’t wait for you to try our other products, we hope you love them just as much! ✨
I’ve followed Leitin on TikTok for ages and have been desperate to get my hands on the LS5 copper peptide serum since its launch . I finally bought my first bottle and have been using it for about two weeks and love it! So far my skin looks more hydrated and glowing. I can’t wait to see the results over the coming months. I’ll definitely keep this product in my routine. ❤️
Store owner replied: Thank you so much, Maryann! We’re so happy you finally got your hands on the LS5 Copper Peptide Serum and are loving it so far! It’s wonderful to hear your skin is already looking more hydrated and glowing after just two weeks. Thank you for your support and for being part of the Leitin community, we can’t wait to hear how you get on over the coming months!
Feels great on your skin, quality product.
Store owner replied: Hi Shodan, glad you're loving it as much as we do! Thanks for the review.
Leitin’s copper peptides have made such a difference to my skin . It’s evened out and is finer, I trust all of Leitin’s products.
Store owner replied: Hi Gabrielle, Thanks so much for your awesome review! So happy to hear the LS5 Copper PeptideSerum is making a difference to your skin. xx
I’ve been searching for a good copper peptide to add to my skincare and this definitely hasn’t disappointed. No wonder it’s highly recommended. The packaging is also beautiful.
Store owner replied: Thank you so much for your lovely review Helen. We’re thrilled to hear that our copper peptides have been the perfect addition to your skincare routine and lived up to the recommendations. We’re so glad you love the packaging too! Thank you for your support and for choosing us x
Stunning packaging and beautiful information cards. The product is beautiful on the skin, sinks straight in and smells divine.
Store owner replied: Hi Victoria, Thank you so much for your beautiful feedback! We’re delighted to hear you’re loving the packaging and information cards, as well as the way the product feels on your skin. We put so much care into every detail, so it’s lovely to know you’re enjoying the whole experience. Thank you for your support! Leitin team x
Feels beautiful on my skin. Just not sure about the scent, it’s not awful but is slightly weird. Not enough for me to stop using it though
Store owner replied: Hi Mischelle, Thank you so much for your honest feedback! We’re glad to hear you’re loving how it feels on your skin, and we really appreciate you sharing your thoughts on the scent too. Feedback like this is so valuable to us as we continue to improve our products. Thank you for your support and for giving it a try xx
Really happy with my purchase I can see a difference in my skin in a matter of weeks will definitely recommend and repurchase.
Store owner replied: Hi Eugenia, Thank you so much for sharing your experience! We’re so happy to hear you’re already noticing a difference in your skin after just a few weeks. It means so much to us that you’re loving your purchase and would recommend and repurchase. Thank you for your support! Leitin team x
Perfect liposomal ghk cu its best one
Store owner replied: Hi Bahar, Thank you so much for your lovely feedback! We’re thrilled to hear you’re loving our liposomal GHK-Cu and that it’s become a favourite in your skincare routine. We truly appreciate your support and are so happy to have you as part of the Leitin community! Leitin team x
The Studies
New studies (1) highlights that GHK–Cu is hydrophilic and has poor natural permeation through the lipophilic stratum corneum. Liposomes, due to their phospholipid bilayer structure, resemble cell membranes and can act as carriers that help shuttle actives into deeper layers of the skin molecules. This means encapsulating GHK–Cu in liposomes improves the likelihood of it reaching the dermis where it can act on fibroblasts, collagen synthesis, and repair pathways.
- Ogórek, K.; Nowak, K.; Wadych, E.; Ruzik, L.; Timerbaev, A.R.; Matczuk, M. Are We Ready to Measure Skin Permeation of Modern Antiaging GHK–Cu Tripeptide Encapsulated in Liposomes?Molecules2025,30, 136. https://doi.org/10.3390/molecules30010136