Founding batch · first run60-day money-backFree US shipping
Peptide skincare for skin in its 40s

Firmer-looking skin from the serum that prints every number.

2% Hexapeptide-11, the full INCI with percentages, and a clear line between what's proven and what's emerging. The whole three-step routine for $78, less than one serum from the brands that hide their formula.

Choose your start
Daily Firm Serum · 2% Hexapeptide-1130 ml
Daily Firm Eye · peptide complex15 ml
Daily Firm Cream · AM/PM50 ml
60-day money-back, keep the bottles
Free US shipping, tracked
Full INCI, with every %
2%Hexapeptide-11, stated on the front
100%INCI disclosed, every ingredient
60Days to prove it, full refund
$78For all three steps
Hexapeptide-11 · Daily Firm Serum

The number nobody shows you

A $90 jar and a $15 serum can carry the same actives at the same strength.

You can't tell which is which. The label says "proprietary blend," and the real percentage is buried on page four, if it's published at all. You've been asked to trust a number you were never allowed to see.

STET prints it instead. Every active, every percentage we're allowed to disclose, on the front of the box, before you buy.

Daily Firm Serum on a rose background

The category's quiet trick

"Clinically proven" can still mean barely in there.

A brand names a star ingredient, then adds a fraction of the amount that was studied. Enough to print the name, not enough to do the work. Or it hides the amount in a blend you can never check. The label still gets to say the word.

  • The activeNamed, on the front.
  • The amountStated as a percentage.
  • The evidenceLabelled proven or emerging.

The lab report

Here's what's in it. Here's how much.

Read the serum the way you'd read a lab sheet. Every active, its INCI name, the percentage, and how settled the science behind it really is.

Daily Firm Serum · 30 mlSTET · Assay sheet 01
ActiveINCI%What it doesEvidence
Hexapeptide-11Hexapeptide-112.0%Supports the look of firmness and elasticity1Emerging
GinkgoGinkgo Biloba Leaf Extract1.0%Antioxidant defense against daily stress4Emerging
Hyaluronic acidSodium HyaluronateFull INCIHolds water for a plumper, smoother look2Proven
Moisture factorSodium PCAFull INCIPart of the skin's own hydration system3Proven
Proven: well-established evidence. Emerging: promising, still being studied. The full INCI is printed on every pack.
The back panel of the Daily Firm Serum box
The back of the box. Every ingredient, in order.

How it works

Signal, bind, hold. What each step does to your skin.

Upper layer Deeper layer · firmness cells Skin surface 2 3 1 02 · BINDHyaluronic acid 03 · HOLDSodium PCA 01 · SIGNALHexapeptide-11
1 · Hexapeptide-11 carries the firmness signal toward the cells below. 2 · Hyaluronic acid pulls water into the upper layer. 3 · Sodium PCA holds it there.
  1. 01 · Signal

    Hexapeptide-11

    A messenger peptide that supports your skin's own firmness and elasticity signalling, so skin looks tauter over weeks of daily use.1

    Emerging
  2. 02 · Bind

    Hyaluronic acid

    Pulls water into the upper layers. Fine lines look softer because the skin around them holds more water.2

    Proven
  3. 03 · Hold

    Sodium PCA

    A moisturising factor your skin already makes. It locks that water in, so the plumper look lasts through the day.3

    Proven

That's the whole mechanism. Support, measured, and labelled proven or emerging.

What the studies show

The research behind each active, with the source.

Every claim on this page points to a published study. The numbers are the study's own, including the strength it was tested at.

4Weeks to better skin elasticity

Hexapeptide-11 improved skin elasticity in a 25-person half-face study.

Volunteers applied a toner with 2.8% Hexapeptide-11 to one side of the face and a toner without it to the other, twice a day. After four weeks, the treated side showed significantly better elasticity. In skin cells, the same peptide switched on the cell's own repair and antioxidant systems.1

EmergingRedox Biology, 2015
76Women, 30 to 60, over 60 days

Hyaluronic acid raised hydration and elasticity against placebo.

Women with wrinkles around the eyes used a hyaluronic acid cream on one eye and a placebo cream on the other, twice a day for 60 days. Every hyaluronic acid cream improved hydration and elasticity. The lighter forms also reduced wrinkle depth.2

ProvenJournal of Drugs in Dermatology, 2011
1967Year it was identified in human skin

Sodium PCA is one of the moisturisers your skin makes itself.

Researchers identified it as a natural humectant in the skin's outer layer. The more PCA a skin sample held, the more water it could bind.3

ProvenJournal of the Society of Cosmetic Chemists, 1967
The First Proof Set on a travertine bathroom counter in morning light

Three steps on the counter. Every number on the label.

The First Proof Set

Three steps. Sixty seconds. Morning and night.

Daily Firm Serum
01

Daily Firm Serum

30 ml · 2% Hexapeptide-11 · 1% Ginkgo

Two pumps on clean, dry skin, face and neck. Press it in.

Daily Firm Eye
02

Daily Firm Eye

15 ml · peptide eye cream

A rice grain, tapped along the orbital bone. A little goes far.

Daily Firm Cream
03

Daily Firm Cream

50 ml · peptide cream, AM/PM

Face and neck to seal everything in. In the morning, finish with SPF 30 or higher.

The honest timeline

Peptides are slow. Here's what to expect.

Hydration shows up first. The firmness support builds with daily use. It's a routine, not a one-night fix.

1Night
Skin feels smoother and more comfortable.
2Weeks
Better hydration. Makeup sits on skin, not in lines.
4–8Weeks
Skin looks firmer. Lines look softer.
60Days
Same light as day one. Take the photo. Compare.

The label test

STET vs. the $90 jar.

What you checkSTETThe $90 jar
Active percentagesPrinted on the front"Proprietary blend"
What you pay forThe formulaThe jar and the ads
The claimSupports firmness, measuredErase, reverse, miracle
EvidenceLabelled proven or emergingImplied, rarely shown
Price$78 for three steps$90+ for one
Guarantee60 days, keep the bottlesVaries

Why STET exists

"I started STET because I was tired of paying for the jar. Every cream promises the same thing, and not one will tell you how much active is inside."

So we built the opposite. Every active, every percentage we're allowed to print, on the label. No miracle words, because skin in its 40s was never a problem to fix.

We're new. There's no wall of paid reviews here and no stock photos pretending to be customers. Just the formula, the numbers, and a 60-day guarantee that puts the risk on us. Read the label. Decide for yourself.

DanielFounder, STET

Made under proof

Certified, vegan, and made to cosmetic GMP.

  • ISO 22716Cosmetic GMP manufacture
  • COSMOS NaturalCertified by Ecocert Greenlife
  • FDARegistered facility and US Responsible Person
  • VeganCruelty-free formula

The proof is the certificate behind the logo, and it's available on request.

The certification panel on the STET box
Daily Firm Serum, Eye and Cream on a rose background

Founding batch · first run

The whole routine, for less than one serum elsewhere.

Three peptide steps for skin in its 40s: treat, eyes, seal. Here's exactly what you get.

Daily Firm Serum · 30 mlStep 1
Daily Firm Eye · 15 mlStep 2
Daily Firm Cream · 50 mlStep 3
60-day money-back guaranteeIncluded
Free US shippingIncluded
Comparable routine $120+$78

Just starting? The serum alone is $42.

The empty-bottle guarantee

Sixty days to prove it. Use every drop.

Not for you? One email and you get a full refund. You keep the bottles. The number on the label is the number in the bottle, and that's the whole promise.

Questions

Answered plainly.

It's new. Why should I trust it with no reviews?

That's exactly why the guarantee exists: 60 days, full refund, and you keep the bottles. Everything we can prove without a customer is already on this page: the full INCI, the printed percentages and the certifications.

Why is it cheaper than the big brands?

You're paying for the formula. Not the jar, the celebrity or the "proprietary" mystery. Same class of actives, printed percentages, honest price.

How soon will I see anything?

Hydration looks better within days. The firmness support from the peptide builds over four to eight weeks of daily use, morning and night.

What does "emerging" mean on the label?

The active has promising evidence that isn't settled yet. We'd rather tell you that than dress it up as proven.

Can I use it with retinol or vitamin C?

Yes. Retinoid at night goes first, then the serum. Vitamin C in the morning goes first, serum after it. With exfoliating acids, use them on alternate nights if your skin is sensitive.

Serum or the full set?

Start with the serum if you want to try one step for $42. The set gives you the whole routine, serum, eye and cream, for $78.

You've read enough labels to know when one is hiding something.

This one hides nothing. The whole routine, every number on it, for $78.

References

  1. Sklirou AD, Ralli M, Dominguez M, Papassideri I, Skaltsounis AL, Trougakos IP. Hexapeptide-11 is a novel modulator of the proteostasis network in human diploid fibroblasts. Redox Biology. 2015;5:205–215. PMC4434199
  2. Pavicic T, Gauglitz GG, Lersch P, et al. Efficacy of cream-based novel formulations of hyaluronic acid of different molecular weights in anti-wrinkle treatment. Journal of Drugs in Dermatology. 2011;10(9):990–1000. PMID 22052267
  3. Laden K, Spitzer R. Identification of a natural moisturizing agent in skin. Journal of the Society of Cosmetic Chemists. 1967;18(6):351–360.
  4. Antioxidant and anti-inflammatory activity of a terpene-free Ginkgo biloba extract on skin, in vitro and in vivo. Journal of Pharmacy and Pharmacology. 1999;51(12):1435–1440.
The First Proof SetSerum + eye + cream · $78