1% GHK-Cu Verified by a 3rd Party Lab
Best for: making the tonic part of your daily routine, and the best value per day. Skin typically feels smoother within 1-2 weeks, with softer-looking fine lines by weeks 6-8, and results build with consistent use.
Discovery SizeBest for a first trial, to see how the tonic fits your routine. For visible changes, we recommend the Full Size. Skin typically feels smoother within 1-2 weeks, with softer-looking fine lines by weeks 6-8.
Choose your plan
Most subscribers choose every 8 weeks.
Heads up: at this interval you may run out before your next bottle arrives, based on typical daily use.
New to PLU? Use code START10 at checkout for 25% off your first subscription order.
Most subscribers choose every 3 weeks.
Heads up: at this interval you may run out before your next bottle arrives, based on typical daily use.
New to PLU? Use code START10 at checkout for 25% off your first subscription order.
Made in the USA of domestic and internationally sourced components.
Firmer-looking skin starts with our GHK-Cu face serum. Just six ingredients with no fluff or filler. Three clinically studied peptides:
The other ingredients are carriers and a gentle preservative. No fragrance, dyes, or other botanical extracts taking up space without delivering benefits. Every peptide in the formula is verified by LC-MS in the finished bottle, at or above the label claim, at the University of Illinois at Chicago.
Choose options
Best for: making the tonic part of your daily routine, and the best value per day. Skin typically feels smoother within 1-2 weeks, with softer-looking fine lines by weeks 6-8, and results build with consistent use.
Why Add Our GHK-Cu Face Serum?
This copper peptide naturally occurs in the skin and supports the skin's natural collagen pathways for a firmer-looking skin appearance. Research shows GHK-Cu levels decline with age, a change that lines up with visible shifts in firmness and fine lines over time. Benefits include:
Published research shows this copper peptide can increase collagen (types I and III) and elastin. Each of these proteins plays an important role in skin firmness and elasticity.
Studies have shown improvements in skin density and thickness with consistent topical GHK-Cu application, for smoother-looking skin with less visible texture.
GHK-Cu has been studied since the 1970s, including its role in skin remodeling. Few skincare peptides have a longer research record.
Independently Tested
Every formula is tested by the Mass Spectrometry Core at the University of Illinois at Chicago. Actives verified by LC-MS in the finished bottle, at or above label claim. Heavy metals screened by ICP-MS. Reports published.
Verified reviews from PLU customers
Six ingredients. Independently verified.
Every batch is third-party tested, and the report is published right on this page.
“Feels more like water than a serum”
It absorbs quickly and feels more like water than a serum. My skin feels firmer and looks more refreshed, especially in the morning, and I haven't had any irritation.
“I know what I'm putting on my skin”
It's super lightweight and absorbs on my skin quickly. My skin feels hydrated with no sticky after feel. I also like the simplicity of the formula so I know what I'm putting on my skin.
Thousands of orders shipped
Made in the USA. 30-day returns, even if you've opened it.
“My skin feels more bouncy”
I see a significant difference in my skin firmness - it's improved. My skin feels more bouncy too. I love it! 10/10 recommend.
“A staple in my routine”
My complexion looks firmer, smoother, and more even, and it absorbs quickly without any irritation. The formula feels high-quality, and it's become a staple in my routine.
“As someone with drier skin”
Instead of the usual tightness, my skin felt more elastic and healthy looking in the mirror. Within even the first month of use, some patchiness softened and smoothed out.
I started using copper peptides April 29, 2026 and it’s now June 23, 2026. I see a significant difference in my skin firmness - it’s improved, and reduction of sun spots. My skin feels more bouncy too. I love it! 10/10 recommend.
Raquel,
Thanks for sharing your progress update, glad to hear you're loving the product.
Best,
The PLU Laboratories Team
My skin feels more hydrated and looks firmer and smoother. Highly recommend!
I'm a big fan of the PLU face tonic and am very impressed with the results, so I wanted to leave a review. This has smoothed out the wrinkles on the sides on my eyes. The bags I have under my eyes are less puffy and less noticeable. My skin feels tighter as well. Very impressed with this product and will continue to use. I'm a dude in my mid 30s that doesn't have a skin care routine outside of using lotion. I wanted to try this with getting noticeable wrinkles and it's been easy to use and I saw results within a week. Awesome, awesome product 😎👍
They send wrong item
Hi Paula,
We're sorry about the mix up! We've sent a replacement item for you. Don't hesitate to reach out if you need anything else!
Best,
The PLU Laboratories Team
I have uses copper for years. I read about PLU and so far it’s great on my senior complexion. I have always taken good care of my skin and this PLU copper fits into my program. I am a senior, and have used other copper, but this one is impressive.
Hi there,
Thanks for the kind review! We're glad t o hear you're enjoying using the product.
Keep us posted on your results!
Best,
The PLU Laboratories Team
Love this product!
Maureen,
Glad to hear you love the GHK-Cu Face Tonic, we appreciate your support!
Best,
THe PLU Laboratories Team
I absolutely love this face tonic! It has been such an easy step to add to my routine and it goes great under makeup. I haven’t used it long but I am already noticing a difference in my skin. I also appreciate how a little bit goes a long way with this product.
Laura,
Thanks for the kind review! We're glad to hear you're enjoying using the product.
Keep us posted on your results.
Best,
The PLU Laboratories Team
I've been using this light-weight tonic for nearly six months and am delighted to incorporate it into my daily skin regimen. I use it daily in my AM and PM routines. My skin soaks it up immediately. I appreciate the results, including improved skin firmness, a more even tone, and a great barrier against environmental factors.
The customer service is responsive and quickly addresses any order issues or concerns.
I highly recommend the product.
Patricia,
Thank you for the wonderful review - We're glad you're enjoying the product.
Best,
The PLU Laboratories Team
Didn't really do anything for me, used for one month every day.
HI there!
Sorry to hear you didn't see great results. We hope you give our larger size a try!
Best,
The PLU Laboratories Team
Really nice product. It soaks into the skin and delivers a nice glow.
J,
Thanks for the kind review! We're glad you're enjoying the product thus far. Keep us posted on your results!
Best,
The PLU Laboratories Team
Starting seeing my dark spots disappear! I really think this solution is a game changer!
Glad to hear you're seeing results! Keep us posted on your progress!
Cheers,
The PLU Laboratories Team
I LOVE this stuff. Has changed my face completely. Helped my recovery time from my tretinoin nights. I use it the night after and it strengthens my barrier and gives me the skin radiance I am looking for.
Isabella - we're glad to hear this helped with your tretinoin recovery. Thanks for being a loyal customer!
Really impressed with this tonic, it feels really clean and works great!
Thanks, Justin! We're glad to hear you're impressed
I’ve been looking for a copper peptide solution for a few weeks and im glad I finally found one. Been using for 3-4 weeks now and the solution soaks into the skin quick without leaving residue behind. The websites ive read say copper peptide products may take 6 weeks to see results but im definitely seeing firmer skin already.
I’ve been using the face tonic daily for around a month. It absorbs quickly and feels more like water than a serum. My skin feels firmer and looks more refreshed, especially in the morning, and I haven’t had any irritation.
Thanks, Sarah! We're glad you like the product.
I've been using the face tonic for the last few weeks and my skin has never looked better. And just in time for the holidays. I will definitely be getting a resupply
As someone with drier skin, I wasn’t expecting a skin tonic to feel this dramatic. Instead of the usual tightness, my skin felt more elastic and healthy looking in the mirror. Within even the first month of use, some patchiness softened and smoothed out. It’s rare to find something work as consistently as the peptides without irritation.
We're glad to hear this helped your dry skin, Wyatt! Thanks for being a customer!
This product is great! It’s super lightweight and absorbs on my skin quickly. My skin feels hydrated with no sticky after feel. I also like the simplicity of the formula so I know what I’m putting on my skin.
Amazing product!
I’ve only been using this a week and I already see an improvement in my fine lines. It’s rare to see noticeable change after that short time period with any product. I also started using it on my neck and the back of my hands. This stuff is amazing. I highly recommend using this as part of your skincare routine.
Very glad to hear you're seeing great results, Jenny! Thank you for being a loyal customer!
Easy to use and seeing some results so far!
AWESOME. Only a week in. Skin looks younger and confidence is oozing. New level of aura unlocked
I’ve been using the PLU GHK-Cu Copper Peptide Face Tonic for a few weeks, and the improvement in my skin is noticeable. My complexion looks firmer, smoother, and more even, and it absorbs quickly without any irritation. The formula feels high-quality, and it’s become a staple in my routine. Highly recommend if you’re looking to boost firmness and overall skin health.
Amazing product! Skin looks great
Firmer, healthy, and noticeably less blemishes! I've been using PLU for over a week now and I've really enjoyed it. I've baked it into my daily routine and I'm happy that I did. I would recommend this product to anyone!
II’ve been using the serum for almost 4 weeks now. I can see some of the fine lines by my eyes and forehead are starting to go away. My skin feels tighter and firmer. I also used to have dark circles under my eyes. This product has also dramatically lightened the circles and bags under my eyes. I highly recommend this product to anyone looking to diminish wrinkles, and get noticeably firmer younger looking skin. Great product all around. You should add this to your daily routine.
Honestly, I didn’t expect to love this face tonic as much as I do. After just a few uses, my skin feels noticeably firmer and looks healthier overall. It soaks in really well and doesn’t leave any greasy feeling. My face feels super clean and refreshed every time I use it. I’ve tried a lot of products that promise results, but this one actually delivers.
Three peptide actives, and three ingredients to carry them and keep them stable.
The headline active, at a full 1%, with the concentration confirmed by an outside lab.
Matrixyl 3000 is the peptide duo used across premium anti-aging serums. This is the first half.
It works alongside Palmitoyl Tripeptide-1, which is why the two are always formulated together.
No oils and no silicones, which is why it absorbs in seconds and layers cleanly.
The workhorse hydrator in skincare, here to move the peptides and keep skin comfortable.
One preservative at a low level, the standard choice for water based cosmetics.
Water, Glycerin, Copper Tripeptide-1, Phenoxyethanol, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7
Independently verified. See the test results.Weeks 1-2
Skin feels smoother with improved texture and comfort
Weeks 3-4
Visible improvements in skin tone evenness and firmer appearance
Weeks 6-8
Notable reduction in fine lines with improved elasticity
Weeks 8-12
Skin texture continues improving, fine lines less prominent
Weeks 12+
Ongoing support for firmer, smoother skin with daily use
Individual results may vary. Research on copper peptides, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, and Acetyl Tetrapeptide-3 noted visible improvements within study timeframes with consistent use of peptide complexes.
Just 6 ingredients. And a lab report to prove it.
Six ingredients or fewer
Three peptides, two carriers, one preservative. Every one earns its place.
Tested in the finished bottle
1% GHK-Cu and the Matrixyl 3000 peptides verified by LC-MS at the University of Illinois at Chicago, at or above label claim. Heavy metals screened by ICP-MS.
Read the lab reportsMade in the USA, 30-day returns
Formulated and produced domestically, with 30-day returns.
A simple daily routine:
Use morning and/or night for the best results. Consistency is key. Do not miss any days or you may delay results.
Face wash → Face Tonic → Sunscreen
Optional: add hyaluronic acid between Face Tonic and sunscreen. Using vitamin C? Use it at a different time of day, or apply it first and wait 20-30 minutes before Face Tonic.
Face wash → Face Tonic → Moisturizer
Optional: add retinol serum or other products
PLU Copper Peptide Face Tonic, 6 ingredients
It's a signaling peptide that tells the skin to do what it already knows how to do. A lot of people notice improvements in the appearance of fine lines, elasticity, and overall skin tone over time.
Yes. Research shows GHK-Cu levels decline as we get older, and that decline lines up with visible changes in firmness, wrinkles and texture over time. A GHK-Cu face serum is a simple way to bring the peptide into your routine.
Most people feel smoother skin within the first couple of weeks and see softer-looking fine lines by weeks 6-8. We want to be very clear about the timeline. This is not a treatment that makes a difference overnight. It takes a while for the benefits of copper peptides to become apparent, so stay patient!
You certainly can. For example, we have an AHK-Cu peptide and GHK-Cu hair serum. We also have a lot of customers who pair our GHK-Cu face tonic with vitamin C, niacinamide, hyaluronic acid, and so much more.
For the most part - especially ours here at PLU Laboratories because it's free of common irritants like parabens, sulfates, silicones, or artificial fragrances. However, as with any new skincare product, we recommend patch testing on a small area first.
No. There is no fluff in anything here at PLU Laboratories, be it our GHK-Cu face serum or hair serum. Only six ingredients, each handpicked for a very specific reason.
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