Acure Radically Rejuvenating Eye Cream costs $19.99 and highlights CoQ10 and edelweiss extract. Hexapeptide 9 formulas do something structurally different. If your bags come from fluid, Acure wins on price. If they come from thinning skin, a hexapeptide 9 cream is the better spend. Here's the head to head.
The question under every eye cream is the same one. "Just tell me if it works on bags." This post compares four formulas on their published ingredient lists and the evidence behind their actives, and one of them isn't a peptide product at all.
The reason the answer matters right now is a study that landed on PubMed in June 2025: a randomized, double blinded trial found that a 0.002% cyclized hexapeptide 9 serum reduced crow's feet number, area, and roughness over 56 days, and beat 0.002% retinol on every wrinkle measure except crow's feet roughness. If a peptide can beat retinol on the wrinkle side of the eye, does it also beat CoQ10 on the bag side? We wanted to know.
An eye cream can mention peptides on the front label and still list them deep in the ingredient list, past what cosmetic chemists call the 1% line. That gap is what this post is about.
What actually causes under eye bags?
Under eye bags are not one thing. According to Mayo Clinic, they come from three separate mechanisms that share one address on your face.
The first is fluid. Salt from last night's takeout pulls water into the lower lid. Sleep on your side and gravity pools it there. That's the puffy version that sometimes settles by noon.
The second is fat. Around age 35 the septum, a fibrous sheet that holds the orbital fat pad in place, weakens. The fat moves forward into the lower lid and stays there. No eye cream on Earth moves fat.
The third is a shadow. The skin under the eye is 0.5mm thick, about a fifth of the thickness on your cheek. When that skin thins with age, capillaries and the tear trough hollow show through. It reads as a bag even when nothing's actually swelled.
Each cause responds to a different ingredient. That's why one $20 cream can transform a fluid bag and completely fail on a fat one, and why the same reviewer will write a 5 star and a 1 star review on the same product.
What does hexapeptide 9 do that CoQ10 doesn't?
Hexapeptide 9 is a synthetic six amino acid chain. In the cyclized form used in the 2025 trial, it signals dermal fibroblasts to produce more type 1 collagen and hyaluronic acid. The trial measured a statistically significant drop in wrinkle number and roughness by day 56, at a working concentration of 0.002%.
The mechanism matters. Collagen is what holds the skin under your eye up. Collagen production slows with age. When collagen production drops, the tear trough hollows, capillaries show through, and the eye starts to read as "tired" even when you slept nine hours. A peptide that credibly restores type 1 collagen tackles that specific mechanism. That is why the Wiley trial matters for eye creams even though the study measured crow's feet, not bags.
CoQ10, the active in the Acure eye cream, is a lipid soluble antioxidant. It sits in the outer layer of the skin and neutralizes free radicals, which slows the collagen breakdown you already have. It does not build new collagen. It does not thicken skin. What it does, and does well for the price, is calm oxidative stress from UV and pollution.
You can see the difference play out on the shelf. Peptide creams tend to price themselves at $45 and up because the raw material is expensive to synthesize. Antioxidant creams sit at $15 to $25 because CoQ10, vitamin E, and green tea have been off patent for decades. The Acure product lands squarely in that antioxidant tier and does not pretend otherwise.
Think of it this way. Antioxidants defend what you have. Peptides ask fibroblasts to make more. Both are useful. They are not doing the same job.
How we picked the four
The four cover the questions this topic usually comes down to: a cheap antioxidant cream for puffiness, a peptide eye cream, and hexapeptide 9 itself. That's a smaller field than we wanted, and one of the four is a UK product.
This is a comparison of published ingredient lists, prices and the cited research, not a wear test. Nobody's under eyes were photographed or measured for this post.
The four eye creams, compared
Here is the shelf. Prices are list prices at the brand's site or a major US retailer, checked in September 2026. The Super Facialist cream is a UK product, so its US price varies.
| Product | Hero active | Best for | Price |
|---|---|---|---|
| Acure Radically Rejuvenating Eye Cream | CoQ10, edelweiss | Morning fluid puffiness | $19.99 |
| Super Facialist Hexapeptide 9 Anti Ageing Eye Cream | Hexapeptide 9, caffeine | Fine lines plus puffiness, budget peptide entry | Varies (UK product) |
| Peter Thomas Roth Peptide 21 Wrinkle Resist Eye Cream | 21 peptide blend | Thinning skin over the tear trough | $75 |
| The Ordinary Argireline Solution 10% | Acetyl hexapeptide 8 at 10% | Expression lines around the eye | $9.70 |
Only one of the four is a hexapeptide 9 formula, and it is a UK product. None of the four lists the cyclized form of hexapeptide 9 used in the 2025 trial.
Why ingredient position matters for peptides
A peptide listed in the first ten slots is more likely to sit at a meaningful share of the formula than one listed after the botanical extracts and preservatives, per the way INCI ordering works when a hero active is really at 0.1%. The Ordinary lists acetyl hexapeptide 8 third. Peter Thomas Roth's first peptide appears fourteenth.
The math is unforgiving. If you paid $60 for an eye cream because the box said "peptide complex" and the peptide sits at position 24, you paid for the fragrance and the cetearyl alcohol.
Runner up: Peter Thomas Roth Peptide 21 Wrinkle Resist Eye Cream
If your bags read as tear trough shadow more than fluid, a peptide cream is the category to look at, and this one has the longest peptide list of the four. It names 21 peptides and neuropeptides, though the first one appears at position 14, after shea butter and the emulsifiers, so each sits at a small share of the formula. Peptides are aimed at the collagen side of the problem, not morning puffiness. That is not a failure. It is a formula built around what its actives can do. The $75 sticker is real money. At least this label names every peptide it uses, which a box that just says peptide complex does not.
Two caveats even so. First, "Peptide 21" is the brand's marketing name for a blend of 21 peptides and neuropeptides, not a single molecule, and hexapeptide 9 isn't on the list. If you specifically want the cyclized hexapeptide 9 from the Wiley trial, this is not that. Second, the list includes phenoxyethanol. If you are the reader whose eye area reacts to phenoxyethanol, patch this on the inner arm for four days before going near the socket.
Budget pick: Acure Radically Rejuvenating Eye Cream
Here is where the antioxidant tier earns its keep. The Acure tube costs about a quarter of the Peter Thomas Roth. If your under eye bag shows up in the mirror at 7 a.m. and softens by lunch, you have a fluid problem, and the fixes that matter most there are salt, sleep position and a cold compress, not an active. CoQ10 and edelweiss will not fix the underlying tissue either, but the cost is low enough that you can use enough to actually cover the socket, which is the honest case for the cheap tube.
The honest caveat
Every one of these creams has a downside.
Two things to say out loud before you buy anything.
First, the CHP 9 study used 0.002% cyclized hexapeptide 9. That's a very specific molecule, patent adjacent, and it isn't what most drugstore "hexapeptide 9" creams contain. Regular hexapeptide 9 is a linear peptide that penetrates less. So a $15 eye cream labeled "hexapeptide 9" isn't the same active as the one in the Wiley trial. Don't read a general peptide review and expect the trial's numbers.
Second, no eye cream fixes fat pad prolapse. If your bag is the type you can feel when you press with a fingertip, and it doesn't budge with cold or elevation, that's a fat and connective tissue issue. The fix is a lower blepharoplasty or filler in the tear trough. Both are outside the eye cream conversation and both are the honest answer we give when a reader asks. For a fluid bag, the drugstore counter is fine. For a fat bag, the drugstore counter is the wrong aisle.
Which one is right for your specific type of under eye bag?
Match the ingredient to the mechanism.
If your bag is worse in the morning, better by afternoon, and improves after coffee or a cold spoon: fluid. Acure at $19.99 is enough. Save the peptide budget for a serum you use on the whole face.
If your bag is a shadow you can see under overhead light, but the tissue itself does not feel raised: thinning skin. A peptide stack (Peter Thomas Roth's Peptide 21, or a hexapeptide 9 cream if you can source one that lists it in the top ten INCI slots) is the better spend. Give it 8 to 12 weeks.
If your bag stays raised in every light, at every hour of the day, and did not exist ten years ago: fat. See an oculoplastic surgeon before you spend another dollar on cream.
The overlap between these categories matters. Most people over 40 have some of all three. That is fine. Buy the product for your dominant cause and stop expecting one cream to fix a face that ages in three directions at once. For a deeper look at the ingredients doing the heavy lifting inside peptide creams, our full breakdown of what peptides actually do inside skin covers the biology. And if you're weighing eye cream picks specifically for puffy mornings, our head to head comparison of Estée Lauder's eye lineup for puffy mornings ranks four with the same INCI method.
If you are starting from scratch
Buy one cream for one job.
That advice will save you the price of a peptide.
Peptide doesn't always beat antioxidant. On the evidence above, it beats it on collagen, ties it on fluid, and loses to it on price. Start with the cheap tube if your mornings explain the mirror, and level up to a peptide only when they stop explaining it.
Don't pay for the ritual, either. If you're picking between a $60 cream with a wand and a $22 cream in a tube, the wand isn't the reason to trade up. The ingredient list is.
One last note on tolerance. Skin around the eye reacts faster than the cheek, so the same peptide serum that sits happily on the jawline can trigger stinging above the socket. Start every eye product at three times a week for two weeks. If it holds, bump to nightly. If it doesn't, the fix is often the vehicle, not the active. A watery lotion with the same peptide often tolerates when the cream form doesn't.
Type an eye cream's name into Skinventry and it pulls up the published ingredient list, checks the box's peptide claims against it, and shows who owns the brand, each fact linked to its source.
For the crow's feet side of the same face, the drugstore roundup we ran for crow's feet last quarter is the companion piece. Different mechanism, different shelf.
