GHK-Cu and Topical NAD+: The Skin Science Behind Two Buzzy Actives
Every few seasons, a skincare ingredient moves from the lab to the shelf to your feed. Right now, two of the most talked-about are GHK-Cu, the copper peptide, and topical NAD+. Both sound clinical. Both are wrapped in promises about firmer, brighter, younger-looking skin.
The reality is more interesting, and more nuanced. One has a fairly long cosmetic research history. The other is new. Here is what each one is, what the evidence says so far, and how to bring them into a routine thoughtfully.
What GHK-Cu Is
GHK-Cu is a small peptide, made of three amino acids, bound to a copper ion. It occurs naturally in the body, including in blood plasma and saliva, and levels are thought to decline with age.
Researchers became interested in it decades ago because of its apparent role in tissue repair. In skin, copper peptides are studied for how they may support the processes behind collagen and elastin, the proteins that give skin its structure and spring.
What the Research Says About Copper Peptides
Topical copper peptides have a longer cosmetic research history than many trending ingredients. Lab studies and small clinical studies suggest they may help support skin firmness, elasticity, and the look of fine lines, and review papers have summarized this body of work.
A few honest caveats:
Many studies are small. Sample sizes are often modest and follow-up periods short.
Some are industry-funded. That does not invalidate the findings, but it is worth keeping in mind.
Formulation matters. Concentration, stability, and how the product is made can all affect what reaches your skin.
FORM offers GHK-Cu as an topical, prescribed when a licensed provider determines it is appropriate.
NAD+, Explained
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every cell. It plays a central role in how cells produce energy and repair themselves. Research suggests NAD+ levels decline with age, which is a big part of why it has become a focus in longevity science.
Skin is constantly renewing and constantly exposed to stressors like UV light and pollution, so it is a natural place to wonder whether supporting NAD+ might help.
Topical NAD+ vs. Niacinamide
This is where the conversation gets more specific.
Topical NAD+ is an emerging skincare ingredient. NAD+ is a relatively large, delicate molecule, and questions remain about how well it penetrates skin and stays stable in a formula. Evidence so far is largely from lab studies and early research. It is promising, not proven.
Niacinamide is a form of vitamin B3 and a well-studied NAD+ precursor, meaning the body can use it to make NAD+. It has a substantial body of skincare research behind it, and studies suggest it may help with the look of uneven tone, redness, enlarged pores, and skin barrier function.
If you want to support your skin's NAD+ pathway with an ingredient that has stronger evidence today, niacinamide is the well-trodden route. Topical NAD+ is one to watch as research develops.
It is also worth noting that topical NAD+ is different from NAD+ injections, which are a separate, provider-prescribed wellness treatment with their own early evidence base.
How to Layer Them Into Your Routine
New actives work best in a simple, consistent routine. A sensible framework:
Start with a gentle cleanser. Stripping your skin before applying actives can make irritation more likely.
Apply serums from thinnest to thickest. Water-based peptide or niacinamide serums typically go on before creams and oils.
Separate copper peptides from strong acids and vitamin C. Common guidance is to avoid using copper peptides in the same step as strong exfoliating acids (like glycolic acid) or L-ascorbic acid vitamin C, since they may reduce each other's effectiveness or increase irritation. Many people use vitamin C in the morning and copper peptides at night.
Niacinamide is generally easygoing. It tends to layer well with most ingredients, including peptides.
SPF is non-negotiable. No serum can make up for daily sun exposure. Broad-spectrum sunscreen every morning protects the results of everything else you do.
Introduce one new product at a time. Give each a couple of weeks so you can tell what is working and what is not.
Patch Testing and When to Check With a Provider
Before adding any new active, patch test. Apply a small amount to an area like the inner forearm or behind the ear for a few days and watch for redness, itching, or swelling.
Talk to a provider or dermatologist before starting if you:
Are pregnant, trying to conceive, or breastfeeding
Have very sensitive or reactive skin
Have an active skin condition such as eczema, rosacea, dermatitis, or an infection
Have a known sensitivity to copper or other skincare ingredients
Use prescription topicals or take medications that affect your skin
For injectable treatments like GHK-Cu, eligibility is always determined by a licensed provider, who will review your health history and current medications.
Frequently Asked Questions
Is GHK-Cu good for skin?
Research suggests topical copper peptides may help support skin firmness and elasticity, though many studies are small. Evidence for injectable GHK-Cu is more limited.
Can I use copper peptides with vitamin C?
Common guidance is to use them in separate steps or at different times of day, for example vitamin C in the morning and copper peptides at night.
Does topical NAD+ work?
It is an emerging ingredient, and evidence is largely from lab and early research. Niacinamide, an NAD+ precursor, has a much larger body of skincare research.
What is the difference between NAD+ and niacinamide?
NAD+ is a coenzyme your cells use for energy and repair. Niacinamide is a form of vitamin B3 that the body can use to make NAD+.
The Beauty-Forward Approach
Great skin rarely comes from chasing the newest ingredient. It comes from understanding what each one can realistically do, choosing a few that suit you, and using them consistently. If you are curious about whether a provider-guided treatment like GHK-Cu could fit alongside your routine, start your FORM intake and a licensed provider will help you decide.
This article is for educational purposes only and is not medical advice. Treatment eligibility is determined by a licensed provider.