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, propanediol, hydroxyethyl urea, dimethyl isosorbide, ehtoxydiglycol, isostearyl isostearate, cyclohexasiloxane, cyclopentasiloxane, copper tripeptide-1 (ghk-cu), ectoin, lecithin, peg-20 methyl glucose sesquistearate, gluconolactone, propylene glycol monocaprylate nf, allantoin, palmitoyl tripeptide-38, palmitoyl tripeptide-4, palmitoyl tripeptide-5, calcium gluconate,acetyl tetrapeptide-9, tripeptide-10 citrulline, methyl glucose sesquistearate, sodium benzoate, microcrystalline cellulose, sphingomonas ferment extract, caprylic/capric triglyceride, cellulose gum, helianthus annuus (sunflower) seed oil, sodium hydroxide, tocopherol,
Next Batch Dispatches In
Our September LS5 Copper Peptide Serum batch is now available for pre-order. Orders ship from 17 September.
Reserve Yours
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: 4.9 / 5 from 68 reviews.
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💖
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
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
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.
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!
The spout is rough and very difficult to use or apply to face or finger. Disappointed.
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.
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
Really happy with my purchase I can see a difference in my skin in a matter of weeks will definitely recommend and repurchase.
Perfect liposomal ghk cu its best one
The copper serum peptide is amazing and the help I have received from you on social media in regards to adding this to my routine has been such a personal experience. You have answered every query I had. I intend to slowly replace all my products with Leitin Skincare it is that good. I am so glad I found you!
A repeat purchase. Great formulation. Feels beautiful on the skin. Visible results with skin integrity, refinement and glow.
LS5 Cooper peptide serum is a staple in my skincare routine. Made a huge difference on my skin and I will always repurchase it.
Excellent product have noticed changes in the skin
Love this product goes so well with my tretinoin & other products. I have sensitive skin and have not had any side effects from this. Love the feeling it gives my skin soft & moisturised. Have only been using it for 2 weeks but will continue to use it will be a staple in my nighttime routine.
Great GHK CU topical. I read about this brand and decided to try it. Consistency is great and goes well under makeup.
I have super sensitive skin and I’m always a little nervous trying new skincare. My skin not only tolerated this serum, but has looked fantastic after using this for several weeks. Thanks for a great serum!
I'm currently on my second bottle so I've been using it long enough to give a proper review. Overall it's a thumbs up for me, first off I love the texture it's very silky and absorbs effortlessly into my skin, the previous copper peptides I was using had a very watery texture, and when applied to my skin it didn't feel as though it was adding any hydration. With this copper peptides it feels very hydrating when applied which as someone with very sensitive/ rosacea type skin is important. I haven't been using this every night as I'm still introducing Retinol and although you can use these products together I'm more of a slow and steady type skincare person. Despite only using this 3-4 times a week I have noticed that my skin texture has improved and my complexion is clearer. Recommended!!
Love this product!
Love the product but need to get more sister products to compliment it further
This is my second bottle. I have noticed improvement in my skin which is something I really love.
On my 3rd Bottle! This stuff is amazing
It's only early days so I can't talk results but I am loving this serum. Absorbs quickly and easily, my skin is looking Radiant which I'm putting down to the introduction of this serum
This is my second bottle I've ordered! So glad you deliver to the UK. Its far superior to anything we can get here. My sensitive hormonal skin loves this product. It sinks in beautifully and layers well with other products. My skin is calmer and a noticeable difference in texture, firmness and fine lines. It also lasts ages as a little goes a long way!
Great product
Beautiful packaging and a lovely product. I Love how it feels on my skin , over a few months my skin has been smoother, and has given it a healthy glow. Very happy with my purchase! Will definitely be repurchasing
Came quickly and beautifully packaged. The product is truly the definition of cosmetic elegance. Very pleasant to use. Five stars from this perspective. Still too early to report on noticeable outcomes, but the science reads like a very effective collection of actives. I've had no irritation with integrating it into my routine. Very pleased I tried this brand/formulation.
Have been using for a few weeks and so far I’m loving this product.
absolutely love it!
I have sensitive skin and my skin loves this product. I will definitely repurchase
Wonderful quality product
Love this new product ! On to my second bottle now. Definitely seen a difference in my skin.
Love this stuff makes my skin look so nice after applying it. I’m only new to it so can’t say a lot, but I would and have already purchase this copper peptide again.
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