GHK-Cu Serum, Cream or Stick? How to Choose the Right Format

Choosing between a GHK-Cu serum, cream or stick comes down to three things: how much of your skin you want to cover, how much moisture your skin wants, and where it fits in your day. A serum is the light, full-face step. A cream adds moisture on top. A balm stick is for small areas that need extra. They all carry the same copper peptide, but they aren't interchangeable, because the formula around the peptide changes how it feels and how you use it.

Here's how each format works, who each one suits, how to combine them, and what format won't change.

Why a GHK-Cu serum, cream and stick behave differently

GHK-Cu is a small peptide with copper attached. Small matters, because the top layer of skin keeps most things out. A widely cited 2000 paper argued that molecules need to be under about 500 daltons to get through the skin barrier. GHK-Cu comes in at around 400, and a 2018 review in the journal Cosmetics notes that copper peptides like it can get through that top layer.

What changes between formats is everything else in the jar. Chemists call that the vehicle. It decides how the product spreads, how long it sits on skin, whether it seals moisture in, and how it layers with the rest of your routine. In short:

• Serum: mostly water. Thin, spreads easily, sinks in fast, layers under anything.
• Cream: oil and water held together. Richer, adds moisture, usually goes on after a serum.
• Balm stick: no water at all, just oils and wax. Stays where you put it and seals moisture in.

Each format, one by one

The serum: the full-face step

A serum is the easiest way to get a copper peptide across your whole face and neck every day. It's thin, so a few drops cover a lot of skin, and it's light enough to go under moisturiser and sunscreen without pilling. It's usually the step designed to carry the active, and in our range it's the one with the most peptide.

Suits: anyone who wants one simple daily step; oily or combination skin that doesn't like heavy layers; routines that already include other serums, as long as vitamin C and strong acids go at a different time of day.

Ours: the serum is 2% GHK-Cu in a light, water-based formula, 45 ml. Three to four drops on clean skin, morning and/or evening.

The cream: moisture on top

A copper peptide cream does two jobs at once: it moisturises, and it adds a second layer of peptide. Because it's richer, it sits on the skin longer and helps hold water in. That makes it the natural second step after a serum, or a single step for people whose skin mostly wants moisture.

Suits: drier skin; anyone who wants to cut a routine down to serum plus one moisturiser; colder months or air-conditioned rooms, when skin feels tight.

Ours: the capsule cream is 0.5% GHK-Cu, in small blue beads that open as you rub it in, with niacinamide, squalane and jojoba oil in the base. Smooth it over the face and neck after the serum and massage until the beads have dispersed.

The balm stick: small areas that need extra

A balm stick is solid and water-free. It softens with skin warmth, stays where you put it, and doesn't spread across your face. That makes it useful for small, specific spots: the outer corners of the eyes, lines between the brows, the neck, the backs of the hands, or anywhere that feels dry. It's also easy to carry.

One thing worth knowing: targeting a small area doesn't make a product stronger. The percentage in the stick is the percentage in the stick, wherever you apply it. You choose a balm for the format, not for a bigger dose.

Suits: anyone who wants extra care in one or two places; dry patches; hands, neck and body; travel.

Ours: the balm stick is 0.5% GHK-Cu in a blend of olive, coconut and jojoba oils with candelilla wax and squalane, 20 g. Swipe it over the areas that need extra care. No rubbing needed.

Serum vs cream vs stick at a glance

	Serum	Cream	Balm stick
Base	Mostly water	Oil and water	Oils and wax, no water
Covers	Whole face and neck	Whole face and neck	Small, specific areas
Feel	Light, sinks in fast	Richer, moisturising	Solid, softens on skin
When	First, on clean skin	After serum	Last, or on its own
Best for	A simple daily step	Moisture plus peptide	Extra care on spots and dry patches
koppā GHK-Cu	2%	0.5%	0.5%

Matching format to your skin

• Oily or combination skin: start with a serum. If you want a cream too, use it on drier areas such as the cheeks rather than everywhere. Our guide to GHK-Cu for oily skin goes further.
• Dry skin: serum then cream, or the cream alone if you want one step.
• Reactive skin: introduce one product at a time, a few days a week at first, and patch test. If something stings or flushes and doesn't settle, stop and check with a dermatologist.
• Specific areas you care about most: add a balm stick to whatever else you use.

Using a GHK-Cu serum, cream and stick together

You can. The order is thinnest to thickest:

1. Serum on clean skin, across the face and neck.
2. Cream on top, massaged in.
3. Balm stick on the spots that need extra.
4. Sunscreen in the morning.

Add products one at a time rather than starting all three on the same day, so you know how your skin takes each one. Our GHK-Cu layering guide covers how they sit with retinol, acids and vitamin C, and our three-step routine shows morning and night. If you want all three together, the Protocol is the set.

What format won't change

Whichever you pick, a few things stay the same. Copper peptides work on slow processes, so judge any of them over a full bottle, not a week. In the most cited skin study, 71 women used a GHK-Cu facial cream for 12 weeks, and a 2018 review in the International Journal of Molecular Sciences reports their skin measured denser and thicker with shallower fine lines. That was one cream in one group, not a test of any serum, cream or stick you can buy, ours included.

Consistency beats format: a product you use every day will do more than a better-looking one you forget. And none of them replaces sunscreen.

Frequently asked questions

Is a GHK-Cu serum or cream better?

Neither is better in general. A serum is lighter and is usually the step built to carry the active; a cream adds moisture. If you only want one product, oilier skin tends to prefer a serum and drier skin a cream. Many people use both, serum first. For choosing a serum specifically, see our guide to choosing a copper peptide serum.

Can I use a GHK-Cu balm stick on my whole face?

You can, but it isn't what it's made for. A water-free balm is richer and stays where you put it, so it suits small areas better than a whole face. For full-face use, a serum or cream spreads more evenly and layers better under sunscreen and makeup.

Does a lower percentage in a cream or stick mean it does less?

Not necessarily, but you shouldn't assume it does more. Each format has its own job. The serum carries the most peptide across the face; the cream and stick add moisture and targeted care on top. Nobody has published a study comparing percentages head to head on skin, so judge each product on how you use it.

The short version

A GHK-Cu serum is the light, full-face step. A cream adds moisture on top. A balm stick gives extra care to small areas. Pick by coverage, by how much moisture your skin wants and by how simple you want your routine, then use it consistently and judge it over a full bottle.