Apparently, if my skincare doesn’t contain peptides right now, I should be concerned.
They’re everywhere. Serums, moisturizers, eye creams, lip treatments. And depending on which package you’re reading, peptides are going to firm, smooth, plump, support collagen and possibly turn back time.
So naturally, I wanted to know: what exactly is a peptide, and does the science match the marketing?
The answer is a little less exciting than the front of the box.
Some peptides have legitimate research behind them. Some look promising. Others have considerably better marketing than independent clinical data.
Which doesn’t mean peptides are bad.
It just means we should probably understand what we’re paying for.
First, What Exactly Is a Peptide?
Here’s the least complicated explanation I can give you.
Amino acids are the building blocks of proteins. Link a relatively small number of amino acids together and you have a peptide. Link many together and you eventually have a protein.
Collagen, for example, is a protein. A small fragment of collagen can be a peptide.
The reason peptides have become so interesting in skincare is that certain peptides may act as signals. The theory is that specific peptide sequences can communicate with skin in ways that influence different biological processes.
And this is where the marketing gets very good.
Some peptides are promoted as signaling the skin to produce more collagen. Others are said to deliver minerals, affect pigmentation or even interfere with the signals involved in muscle movement.
That last category is where you’ll occasionally see a topical product compared with an injectable.
And that’s usually where my eyebrow goes up.
Not All Peptides Are the Same
“Contains peptides” doesn’t actually tell you very much.
There are several different categories used in skincare, and they’re intended to do very different things.
Signal peptides are probably the ones you’ve heard the most about. Ingredients such as Matrixyl and palmitoyl tripeptide-38 fall into this group. They’re generally marketed around supporting collagen production. There is laboratory research supporting activity for some of them, although independent human clinical research and the size of the visible effects are more variable.
Carrier peptides include the copper peptides that have become increasingly popular. The idea is that the peptide helps carry a mineral to where it’s needed. There’s research behind the concept, although exactly how much difference they make in a finished cosmetic formula is still debated.
Then there are neurotransmitter-affecting peptides such as Argireline.
These are the ones that get especially interesting because you’ll sometimes hear them described as “Botox in a bottle.”
Let’s just say I would manage my expectations.
The published evidence isn’t remotely comparable to botulinum toxin, and a topical skincare product and an injectable working at the neuromuscular junction are two very different things.
Finally, there are enzyme-inhibiting peptides, which are designed to interfere with enzymes involved in various visible signs of aging. This is another area where the research is still relatively limited.
So, Do Peptides Actually Work?
This is where the answer becomes annoyingly unsatisfying:
Some might.
Specific peptides, used at appropriate concentrations in properly formulated products, have produced measurable results in laboratory research and some smaller clinical studies.
That’s meaningful.
But it’s a very different statement from saying that peptides as an entire category have been proven to produce all of the results currently being advertised.
The research really began expanding in the 2000s and 2010s, and some of the evidence comes from in-vitro research or studies funded by ingredient manufacturers.
Again, that doesn’t make the research meaningless.
It just matters when you’re deciding how much confidence to put behind a claim.
My issue isn’t with peptides.
It’s when “promising” quietly turns into “proven” somewhere between the laboratory and the Instagram ad.
Then I Started Looking at Antioxidants
This was the comparison that ultimately mattered when we were developing Apposé Lip TX.
Antioxidants aren’t particularly new or trendy.
Which, as it turns out, is part of their appeal.
Vitamin C has been studied for decades. Research into its topical use expanded significantly beginning in the 1980s, and there is an enormous body of published work examining its antioxidant activity, stability and delivery.
Vitamin E has an equally long history in topical skincare and is well established as a lipid-soluble antioxidant.
And then there was the ingredient that really caught our attention: astaxanthin.
Astaxanthin has been studied for its antioxidant activity for decades, with published research examining both its antioxidant capacity and potential skin benefits.
It’s not suddenly having a moment because someone gave it a catchy new name.
The research has been building for years.
And I liked that.
New Isn’t Bad. Proven Isn’t Boring.
I think beauty has trained us to believe the newest ingredient must somehow be the best ingredient.
Sometimes it may be.
Science advances. Formulations improve. New ingredients are discovered and older ones are used in smarter ways. I’m absolutely interested in all of it.
But when we were deciding what belonged in Lip TX, we kept coming back to a fairly simple question:
What can we actually stand behind?
Not what sounds impressive on the carton.
Not what’s trending this year.
Not what gives us the best TikTok hook.
What has enough research behind it that we feel good putting it in the formula and telling you why it’s there?
That led us back to antioxidants.
Why We Didn’t Put Peptides in Apposé Lip TX
Not because peptides are useless.
They’re not.
We simply chose to build Lip TX around ingredients with a longer-established research history.
The antioxidant panel includes astaxanthin, fucoxanthin, stable oil-soluble vitamin C and tocopherol, along with additional supporting antioxidant ingredients.
Could we have added a peptide and put WITH PEPTIDES on the box?
Probably.
Would that have made Lip TX a better product?
That was the question that mattered more.
We weren’t trying to create the longest ingredient list or check every box currently trending in beauty. We wanted each ingredient to have a reason for being there.
Sometimes innovation means adding something new.
Sometimes it means knowing when not to.
Apposé Lip TX. Arrive Ready.
A Few Questions I Had Too
So, do peptides work or not?
Some peptides have shown measurable activity in laboratory studies and smaller clinical studies. The important thing is to look at the specific peptide, concentration, formulation and claim rather than assuming everything labeled “peptide” delivers the same result.
There’s a lot of territory between does nothing and miracle ingredient.
That’s generally where the truth lives.
Can I use peptides and antioxidants together?
Yes. The source material doesn’t identify a chemical conflict between the two categories, and skincare routines can include both.
The better question isn’t necessarily whether you can use both.
It’s whether every ingredient or product you’re adding is actually doing enough to earn its place in your routine.
Are antioxidants safer than peptides?
Both categories are generally considered appropriate for topical cosmetic use. Antioxidants simply have the advantage of a much longer history of use and research.
And when we were developing Lip TX, that history mattered to us.
Not as exciting as chasing the newest ingredient.
But then again, we’re making lip treatment—not headlines.
That last line feels very Apposé to me: “We’re making lip treatment—not headlines.” It gives the article a point of view without making the brand sound anti-peptide.
I also think “Sometimes innovation means adding something new. Sometimes it means knowing when not to.” is strong enough to pull out as a social graphic when you start educating around Lip TX.
Sources
this review in the Journal of Cosmetic Dermatology https://pubmed.ncbi.nlm.nih.gov/34897953/
Acta Biochimica Polonica in 2012 https://pubmed.ncbi.nlm.nih.gov/22428137/
the Apposé Lip TX product page https://shopappose.com/products/appose-liptx