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At KB Beauty Backroom, we prioritize the quality and authenticity of every product we offer.
Each product undergoes third-party, multi-vial batch testing to verify purity, compound identity, quantity, and endotoxin levels. In addition to this rigorous testing process, every vial includes a unique batch number, allowing you to directly match your product to its corresponding laboratory testing report.
Peptide-forward skincare featuring GHK-Cu, one of the most referenced copper peptides in dermatological and skin remodeling research.
Choose the lighter 3% GHK-Cu serum, the richer 6% GHK-Cu cream, or try both to see which texture your skin loves most.
From Kelly
Real talk: I’m a bit of a product whore. I’ve been pretty promiscuous over the course of my skin care and hair care journey, and my vanity basically looks like a natural beauty storefront.
There are brands I’ve consistently loved and still keep in rotation, but your girl has finally locked in…and I’m in love.
Enter my first-ever, 15-years-in-the-making skincare formulas, featuring ingredients that are actually interesting to me from a biological research perspective.
You may have heard that I’ve had a peptide renaissance — aka my mid-life glow-up — and once I learned about and experienced the potential of these compounds, of course I wanted to slather them all over my face.
I started with single-peptide serums from questionable vendors and found myself layering 5–7 products morning and night. It just felt silly.
So now, the Beauty Backroom has two GHK-Cu skincare options: a lighter 3% GHK-Cu serum and a richer 6% GHK-Cu cream.
You can choose the one that best fits your skin and texture preferences, or try both if you’re curious and want to see which one earns permanent residency on your vanity.
The search is officially over.
Choose Your Peptide Perfecting Complex Formula
Both formulas feature peptide-forward skincare ingredients studied in dermatological research, including GHK-Cu, collagen-support pathways, skin remodeling support, oxidative stress, and barrier support.
The difference is texture and concentration.
Choose the lighter 3% GHK-Cu serum if you prefer a more lightweight feel.
Choose the richer 6% GHK-Cu cream if your skin tends to be dry or you want a more cushiony, barrier-support-style moisturizer.
Not sure? Try both and see which one your skin prefers.
Peptide Perfecting
Complex Serum
A lighter topical formula featuring 3% GHK-Cu, designed for those who prefer a serum-style texture.
Best for women who want a more lightweight peptide-forward skincare option or who prefer a less rich finish on the skin.
(Features GHK-Cu plus additional peptide-forward ingredients studied in collagen synthesis, expression-line models, and skin remodeling pathways.)
Peptide Perfecting
Complex Cream
A richer, cream-style formula featuring 6% GHK-Cu concentration, designed for those who want a more moisturizing, barrier-support feel.
Best for dry or mature skin, or for anyone who prefers a richer cream texture.
(Features GHK-Cu plus hydration, vitamin, antioxidant, and skin-support ingredients studied in dermatological research.)
Peptide Perfecting
Complex Duo
Not sure which texture you’ll prefer? Try both.
The bundle includes the lighter 3% GHK-Cu serum and the richer 6% GHK-Cu cream so you can compare them, rotate them, or keep both on hand depending on what your skin wants.
Which One Should I Choose?
Choose the Serum If…
You prefer a lighter texture.
You do not want a rich cream feel.
You like serum-style skincare.
You want the 3% GHK-Cu option.
Your skin does well with lighter layers.
You want a more flexible formula to use under other skincare.
The serum is the lighter option with 3% GHK-Cu.
Choose the Cream If…
Your skin tends to be dry.
You like a richer moisturizer.
You want a barrier-repair-style cream.
You want the stronger 6% GHK-Cu concentration.
You prefer a more cushiony, moisturizing feel.
You want one product that feels more complete on its own.
The cream is the richer option with 6% GHK-Cu.
Still not sure? Try both and let your skin decide.
Some women may prefer the serum during the day and the cream at night, while others may find one clear favorite.
The Research Beneath the Glow
These formulas are built around ingredients studied in skin-focused research, including copper peptides, collagen synthesis pathways, extracellular matrix remodeling, oxidative stress, hydration, and barrier support.
The serum and cream share a similar research foundation, but they offer different textures and different GHK-Cu concentrations, giving you a choice between a lighter 3% serum and a richer 6% cream.
GHK-Cu / Copper Peptide Research
GHK-Cu is studied for its role in collagen and elastin synthesis, metalloproteinase modulation, antioxidant signaling, inflammatory response, and skin remodeling pathways.
The serum features 3% GHK-Cu.
The cream features 6% GHK-Cu.
Collagen + Skin Remodeling
Several ingredients in these formulas are studied in relation to collagen synthesis, extracellular matrix remodeling, fibroblast signaling, and structural skin support.
Featured research ingredients include Matrixyl 3000, Syn-Coll, GHK-Cu, and hyaluronic acid.
Expression-Line Research
Peptides like Argireline, SNAP-8, Pentapeptide-18, and SYN-AKE are explored in models related to facial muscle contraction pathways, neurotransmitter signaling, and expression-line formation.
Ingredient tags: Argireline · SNAP-8 · Leuphasyl · SYN-AKE
Antioxidant + Barrier Support
The richer cream is especially relevant for those who want a more moisturizing, barrier-support feel.
Ingredients such as hyaluronic acid, B vitamins, and antioxidant-support compounds are studied in relation to hydration, cellular turnover, skin barrier function, and oxidative stress models.
Why Settle for Just One
"Hero" Ingredient?
Compare KB Skin Care to other leading brands and discover why a complete, multi-peptide formula delivers superior results.
| Features, Benefits & Ingredients | Other Popular Peptide Brands | KB Skin Care |
|---|---|---|
| Clearly disclosed 3% GHK-Cu serum | ✕ | ✓ |
| Clearly disclosed 6% GHK-Cu cream | ✕ | ✓ |
| Two texture options with different GHK-Cu strengths | ✕ | ✓ |
| Eight-peptide formula in one product | ✕ | ✓ |
| Expression-line peptide blend (Argireline, SNAP-8, SYN-AKE, Leuphasyl) | ✕ | ✓ |
| Collagen-signal peptide blend (Matrixyl 3000, Syn-Coll, Syn-Tacks, GHK-Cu) | ✕ | ✓ |
| Copper peptide + expression peptides + collagen peptides in one formula story | ✕ | ✓ |
| Antioxidant support complex (CoQ10, Alpha Lipoic Acid, Green Tea, Vitamin E) | ✕ | ✓ |
| Vitamin skin-support complex (Vitamin C Ester, B5, B6, B12) | ✕ | ✓ |
| Organic aloe-based formula | ✕ | ✓ |
| Organic carrier oils like argan, jojoba, sunflower, and evening primrose | ✕ | ✓ |
| Richer cream option for dry or mature skin | ✕ | ✓ |
| Lighter serum option for those who prefer weightless layering | ✕ | ✓ |
| 100% natural formula | ✕ | ✓ |
| 72% organic formula | ✕ | ✓ |
| No parabens | ✕ | ✓ |
| Third-party tested | ✕ | ✓ |
| Founder-curated by Kelly Brogan, MD | ✕ | ✓ |
| Designed to replace a complicated multi-serum peptide routine | ✕ | ✓ |
| A more complete peptide-forward formula, not just one hero ingredient | ✕ | ✓ |
Hi, I'm Kelly!
Science-backed wellness essentials designed for a woman’s real life—from hormones to energy, gut health, sleep, and skin.
Inside the Peptide Complex
A closer look at the research ingredients featured across Kelly’s peptide-forward skincare options.
GHK-Cu / Copper Peptide
A copper peptide studied in collagen and elastin synthesis, metalloproteinase activity, antioxidant signaling, inflammatory response, and skin remodeling pathways.
The lighter serum features 3% GHK-Cu.
The richer cream features 6% GHK-Cu.
Matrixyl 3000
A palmitoyl peptide complex studied for its role in collagen I, III, and IV synthesis and extracellular matrix remodeling signaling.
Argireline / Acetyl Hexapeptide-3
Studied in neurotransmitter inhibition models and facial muscle contraction pathways, especially in relation to expression-line research.
SNAP-8
An octapeptide studied as an extended analogue of Argireline and explored in wrinkle-depth and expression-line research models.
Pentapeptide-18 / Leuphasyl
Studied for enkephalin-mimicking activity and potential synergy with Argireline in expression-line research models.
SYN-AKE
A synthetic tripeptide studied in models exploring snake venom analogue peptides and neuromuscular signaling in skin.
Syn-Coll
A palmitoyl tripeptide studied for its ability to stimulate procollagen synthesis and collagen production pathways in dermal fibroblasts.
Syn-Tacks
A dipeptide complex studied for its role in supporting dermal-epidermal junction integrity and adhesion molecule expression in skin models.
Hyaluronic Acid
A naturally occurring glycosaminoglycan studied for water retention, hydration, and extracellular matrix support in skin tissue.
Vitamin B5 / Pantothenic Acid
Studied in wound-healing and skin barrier repair models, including fibroblast proliferation and migration.
Vitamin B6 / Pyridoxine
Studied for its role in amino acid metabolism relevant to collagen and keratin protein synthesis pathways.
Vitamin B12
Studied in skin cell regeneration and inflammatory response models, including DNA synthesis in rapidly dividing cells.
How To Use Your Formula
The Ritual
Use your chosen formula after cleansing, as part of your morning or evening skincare routine.
If using the serum, apply a small amount to clean, dry skin and follow with additional moisturizer if desired.
If using the cream, apply to clean, dry skin as your moisturizing step.
If trying both, experiment with each separately to see which texture your skin prefers. You may find that you prefer the lighter serum during the day and the richer cream at night, or you may choose one as your everyday favorite.
For external use only. Avoid contact with eyes. Discontinue use if irritation occurs.
Beauty Backroom Consult
Book a call with one of our enrollment specialists to find our if our private beauty consulting is a good fit for you.
Quality First
Every peptide is independently tested to confirm identity and integrity, with verifiable Certificates of Analysis available for transparency.
Fast Shipping
Orders are carefully processed and shipped within 3-5 business days, ensuring timely delivery without compromising quality.
Proactive Support
Our team is here to provide knowledgeable, responsive support, before and after your order.
Frequently Asked Questions
Do I need both the serum and the cream?
No. These are not a required two-step system.
Choose the formula that best fits your skin type, texture preference, and desired GHK-Cu concentration.
The serum is lighter and features 3% GHK-Cu. The cream is richer and features 6% GHK-Cu.
What is the difference between the serum and the cream?
The serum is a lighter formula with 3% GHK-Cu. It is best for those who prefer a serum-style texture or a less rich feel.
The cream is richer and more moisturizing, with a 6% GHK-Cu concentration. It is best for dry skin or anyone who wants a more barrier-support-style cream.
Which one should I choose?
Choose the serum if you prefer lightweight skincare.
Choose the cream if your skin is dry, mature, or prefers a richer moisturizer.
If you are not sure, try both and see which one your skin likes better.
Can I use both?
Yes, but you do not need to.
If you buy both, we recommend experimenting with them separately first so you can feel the difference.
Some women may prefer the serum during the day and the cream at night, while others may choose one favorite.
What does GHK-Cu do?
GHK-Cu is a copper peptide studied in dermatological research for its role in collagen and elastin synthesis, antioxidant signaling, inflammatory response, and skin remodeling pathways.
What does “research formula” mean?
It means the ingredient descriptions are being discussed in the context of published dermatological and peptide research.
These products are not intended to diagnose, treat, cure, or prevent any disease.
Is this a medical treatment?
No. These products are not intended to diagnose, treat, cure, or prevent any disease.
Ingredient descriptions are provided for educational and research-context purposes only.
Do you ship internationally?
Yes we ship internationally. These are the list of countries we ship to: US, Canada, the Philippines, Hongkong, Colombia, Cyprus, Ecuador, Japan, Mexico, Netherlands, Panama, Peru, Poland, Puerto Rico, South AFRICA, Taiwan, Thailand and UK.
Why do I need an account to view the site?
An account helps us provide a more secure shopping experience, manage customer access, and offer better support for your orders.
How long do orders take to arrive?
Orders are carefully processed and typically ship within 3–5 business days. Delivery time depends on your location and selected shipping method.
I think my package may be lost, or I’m having an order issue. What should I do?
Please contact our support team [email protected] so we can help investigate and resolve the issue.
The statements made within this website have not been evaluated by the Food and Drug Administration. The products we offer are not intended to diagnose, treat, cure, or prevent any disease.
The peptides sold on this website are intended for research use only, unless prescribed by a licensed physician. The buyer is responsible for adhering to all local laws and regulations. KB Beauty Backroom is not a pharmacy and does not provide medical advice or prescriptions.
Consultations are offered in partnership with independent providers. Always consult with a healthcare provider or medical professional before starting any peptide-based treatment.
The information provided on this website is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
Ingredient descriptions are provided for educational context and reflect research literature on individual components. No claim is made that the finished product produces any specific medical or cosmetic outcome.
If you have questions or concerns about your health, please talk to your doctor.
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