The Peptide Collection
Precision peptides.
A luminous ritual.
Meet HanJae — a Korean skincare house built around the quiet power of peptides. Each formula pairs GHK-Cu, SNAP-8 and hyaluronic acid for luminous, replenished skin.
GHK-Cu + SNAP-8 + Peptides + Hyaluronic Acid
The world’s most powerful formula
For wrinkles, smoothing & youthfulness
And for shiny hair
01 / The Serum
The art of skincare.
The promise of a ritual.
The Peptide Serum
The world’s most powerful formula for wrinkles, skin smoothing and youthfulness — and for shiny hair. A signature pairing of GHK-Cu and SNAP-8, complemented by peptides and hyaluronic acid.
For the moments you take for yourself. For a routine that feels considered. For your own expression of radiance.
GHK-Cu + SNAP-8 + Peptides + Hyaluronic Acid
$49.00
30ml · Complimentary ritual shipping ($9.99 applied at checkout)
02 / The Ingredients
Considered ingredients.
A singular vision.
Peptides take centre stage in HanJae’s signature serum. Often described as nature’s botox, this considered blend of GHK-Cu, SNAP-8 and hyaluronic acid is a cosmetic approach to the look of skin that feels smooth, rested and replenished.
Nature’s botox — reimagined as a daily ritual.
GHK-Cu
The Copper Peptide
A three-amino-acid peptide bound to a copper ion. The peptide carries the copper; the copper is a cofactor for enzymes the skin already uses to maintain its own collagen and elastin. Skin looks firmer, more even and more rested.
SNAP-8
The Complementary Peptide
A synthetic octapeptide modelled on part of the SNARE complex — the machinery behind muscle signalling. It works through a different pathway entirely, for a softer look to the lines that repeated expression leaves behind.
Hyaluronic Acid
The Hydration Humectant
A moisture-loving molecule that helps skin look plump, dewy and replenished.
Peptide blend
The Finishing Touch
A supporting blend that completes The Peptide Serum.
Every drop.
A little intention.
03 / The Peptide Pair
Two peptides.
Two different jobs.
Most peptide products are built around a single active. The Peptide Serum is built around two, chosen because they work through entirely separate mechanisms — and because they complement rather than duplicate one another.
GHK-Cu
The copper carrier
GHK-Cu is a tripeptide — three amino acids, glycyl-L-histidyl-L-lysine — bound to a copper(II) ion. The sequence occurs naturally in human plasma, and it is the binding that makes it interesting: the peptide has a strong affinity for copper, so it holds the metal inside a stable, chelated structure.
That matters because copper is not an inert ingredient. Loose copper is reactive and can drive oxidation; held within a peptide, it is delivered in a controlled form. The peptide is the vehicle, and the copper is the payload.
And the payload is not a foreign substance. Copper is an essential trace element the skin already depends on — a cofactor for lysyl oxidase, the enzyme that cross-links collagen and elastin, and for superoxide dismutase, part of the skin’s antioxidant defence. Working with those systems is what shows up as skin that looks firmer, more even and more rested.
SNAP-8
The messenger that gets in the way
SNAP-8 is a synthetic octapeptide — eight amino acids — designed as a copy of the N-terminal end of SNAP-25, a protein best known for its role in the nervous system.
SNAP-25 is one of the proteins that assemble into the SNARE complex, the machinery a nerve ending uses to release its signalling molecules. SNAP-8 mimics one of the domains that complex needs, and applied topically it competes for that position. The visible result is a softer look to the fine lines that repeated expression leaves behind.
It works through an entirely different pathway to GHK-Cu — no needle, no freezing, no downtime. It is a cosmetic approach to the look of expression lines and does not replace a procedure. What it does do is give the formula a second, gentler register.
Why the blend, and why it behaves differently
Two mechanisms, not one
GHK-Cu works on the look of firmness and evenness through the skin’s own maintenance enzymes. SNAP-8 works on the look of expression lines through a messenger pathway. Most peptide products choose one. This one addresses both, because they are not doing the same job twice.
The copper is bound, not loose
A copper peptide is only as good as the complex it forms. Bound inside GHK-Cu, the copper is chelated and stable. In a formula that treats copper as a simple additive, it is not — which is the difference between an ingredient on a label and an ingredient that behaves.
The base protects the actives
Peptides are short chains of amino acids, and they are fragile: the wrong pH, heat, prolonged light or an aggressive solvent will break them apart. A light, water-based serum keeps both peptides soluble and intact, and lets them spread evenly rather than sitting in a heavy film.
Hydration makes the rest visible
Hyaluronic acid is not a supporting extra. A plumper, smoother surface scatters light more evenly, so the look of firmness and the softening of lines actually read. Without it, the peptide work is far harder to see.
04 / Skin Types
Written for every skin.
Read it for yours.
Skin type is not a fixed property — it shifts with season, climate, hormones and age. What follows is how a light, water-based peptide serum behaves on each of the five patterns, and which of the four ingredients is doing the work in each case.
Normal
BalancedSebum production and water content sit in balance, so skin rarely looks tight or shiny. The serum works here as maintenance rather than correction: hyaluronic acid keeps the surface hydrated, GHK-Cu supports the look of firmness over time, and SNAP-8 softens the look of expression lines. One step, morning and evening.
Dry
Water-poorSkin produces less sebum and loses water more readily, so it can look tight, dull or rough. Hyaluronic acid is the workhorse: a humectant that binds water and holds it in the upper layers, so the surface looks plump and dewy rather than tight. The light, water-based base layers comfortably without the weight of a balm, while GHK-Cu supports the look of an even, rested surface.
Oily
Sebum-richOily skin is rarely short of oil, so the goal is hydration without addition. Because the formula is water-based and weightless, it delivers hyaluronic acid to the surface without adding a lipid load. Hydration is also what makes the look of pores finer — a plumper, smoother surface reflects light more evenly. SNAP-8 and GHK-Cu work on the look of lines and firmness without heavy texture.
Combination
Mixed zonesAn oily T-zone with drier cheeks is the most common pattern, and the one a single product struggles with most. A weightless, water-based serum answers it: hyaluronic acid hydrates the drier outer areas while the light base leaves the forehead, nose and chin without a film. Apply everywhere, then add a second layer on the cheeks if they ask for it.
Sensitive
Easily unsettledReactive skin has a barrier that is easily disturbed, so what a formula leaves out matters as much as what it puts in. This is a short, water-based formula rather than a rich cream — nothing heavy to sit on the surface, nothing that needs rubbing in. Hyaluronic acid is among the best-tolerated humectants, and the peptide actives sit in a light base. Introduce it gradually: every second evening for a week, then daily.
05 / Barrier & Pores
The barrier, understood.
The pore, reconsidered.
Two words carry most of the weight in skincare writing, and both are usually explained badly. Here is what they actually describe — and where each ingredient meets them.
The skin barrier
Bricks, mortar, and what moves through them
The outermost layer of the skin, the stratum corneum, is usually described as bricks and mortar. The bricks are flattened, hardened cells called corneocytes; the mortar is a lipid matrix of ceramides, cholesterol and free fatty acids. That matrix is what keeps water in and the outside world out. When it is compromised, water escapes more readily and skin looks tight, rough and reactive rather than comfortable.
Hyaluronic acid meets the barrier from the hydration side. It is a glycosaminoglycan — a long, unbranched sugar chain that occurs naturally in the skin’s extracellular matrix — and it is a humectant: it binds many times its own weight in water and holds it in the upper layers, so the surface looks plump and even rather than dehydrated.
GHK-Cu meets it from the maintenance side. It is a short peptide bound to a copper ion, and copper is a cofactor for enzymes the skin uses in its own housekeeping — including superoxide dismutase, part of the skin’s antioxidant defence. A light, water-based serum works with the barrier by keeping the surface hydrated without the heaviness of an occlusive balm.
The pore
An opening, not a switch
A pore is the visible opening of a pilosebaceous unit: a hair follicle with its sebaceous gland attached. Pores do not open and close like windows. What changes is how visible they look — and two things drive that.
The first is what sits in the opening. Sebum and shed corneocytes can collect there and give the pore an edge, which is why the look of pores tends to follow sebum production rather than pore size.
The second is optical. A hydrated surface is a smoother, plumper one, and smoother surfaces scatter light more evenly — so the same pore reads as finer. That is where hyaluronic acid does its quiet work in this formula, and why a weightless texture matters: a heavy base can settle into the opening and emphasise exactly what you would rather not see.
06 / The Hair Ritual
Beyond the face.
The scalp, and the lengths.
The same bottle goes further than the skin. Copper peptides and hyaluronic acid have a long history in hair care, and The Peptide Serum is rubbed into the scalp as well as applied to the face — worked in at the roots to help support healthy hair growth, and run through the lengths for shine.
On the scalp
Where the follicle actually lives
A hair follicle is not a separate organ set apart from the skin. It sits in the same extracellular matrix, served by the same circulation, surrounded by the same collagen and elastin scaffolding — which is why a serum built for the skin can be rubbed directly into the scalp to help support healthy hair growth.
The control centre is the dermal papilla: a cluster of cells at the base of the follicle that directs the entire hair cycle, from the long growth phase through to the resting phase. Copper is central to that environment. It is a cofactor for lysyl oxidase, the enzyme that cross-links the collagen and elastin anchoring the follicle, and for superoxide dismutase, part of the antioxidant defence that protects actively dividing cells. Copper is also closely involved in angiogenesis — the formation of new blood vessels — and a follicle in its growth phase depends on a dense vascular network to supply it with oxygen and nutrients.
GHK-Cu carries that copper in a stable, chelated form, and applying it to the scalp puts it where the follicle is. Applied to the hair shaft instead, none of it reaches the structure that matters.
The growth cycle
Why consistency is the whole point
Hair does not grow continuously. Each follicle cycles through a long growth phase, a short transition and a resting phase in which the fibre is eventually shed — and the cycle is measured in months, not days. Scalp hair lengthens at roughly a centimetre a month.
That timescale is why a scalp ritual is a habit rather than a quick fix. Daily application keeps a steady supply of the actives at the follicle across the whole cycle, rather than a single dose at the moment you happen to remember.
In practice
Two or three drops, massaged in
Part the hair and apply two or three drops directly to the scalp, then massage with the fingertips for a minute. The massage is not incidental — it moves the serum down to the follicle openings and brings blood flow to the scalp surface.
Use it on damp or dry hair, morning or evening. Leave it in; there is nothing to rinse. Whatever remains on the palms is then run through the mid-lengths and ends.
Through the lengths
Shine is a surface phenomenon
A hair fibre reflects light best when its outer layer — the cuticle — lies flat and smooth, and worst when the cuticle is raised by dryness, friction or chemical processing.
Hyaluronic acid is a humectant for hair as it is for skin. It binds water to the fibre so the cuticle sits flatter, and a flatter cuticle is what reads as gloss. The supporting peptide blend carries the actives evenly, so a few drops spread through the lengths without weighing them down.
07 / The HanJae World
Beauty, in motion.
Light. Texture. A moment of stillness. Step inside the HanJae ritual.
The Peptide Serum
A Study in LightA moment for you
The Daily RitualHanJae / Korean Skincare