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The skin will tell you the rest.

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Firming Serum
$125.00
Firming Serum
Fine Lines + Firmness

Firming Serum

Peptide-led support for expression lines, firmness, and elasticity. Built for eyes, lips, and high-movement areas without freezing expression.

Eyes + LipsExpression linesAM / PMscent-free
$125.00 30 ml / 1 fl oz
100% PLASTIC-FREE
Formulated & shipped from Resonance Marin, Marin County, CA
Returns accepted within 30 days — half-full minimum
4
Clinically studied peptides, each targeting a different mechanism of expression aging
4x
Molecular weights of hyaluronic acid for deep and surface hydration in one step
0
Fragrance: scent-free for eyes, lips, and sensitive areas
100%
Plastic-free aluminum packaging, fully recyclable
The Brief

Smoother on contact.
Firmer with time.

Firming Serum was developed as a no-tox alternative to injectables. A peptide-forward formula that works with the skin's natural relaxation pathways rather than against them. Designed for the eyes, lips, and nasolabial folds, where skin is thin, mobile, and where the first signs of aging tend to appear.

Read more

Neuropeptides, collagen-supporting peptides, and multi-weight hyaluronic acid soften the appearance of crow's feet, under-eye creasing, lip lines, and forehead wrinkles. Bioactive extracts support microcirculation, reducing the look of puffiness and fatigue around the eye contour. The formula is scent-free and layers cleanly with everything in the routine.

Result: with consistent use, Firming Serum visibly reduces fine lines, improves firmness, softens expression lines, and restores a smoother, well-rested look across the most mobile areas of the face.

The Brief
Where it fits
Where
it fits.
Morning
or evening.

Firming Serum is the treatment step in the Firming System. Apply over hydrated skin, then defend, seal, finish, and protect.

01
Cleanse
Gentle Cleanser
Preserves the barrier active treatment depends on.

Apply to damp skin and rinse with lukewarm water. Peptide treatment lands better when the surface is intact, not stripped.

02
Activate
XO Essence
Prepares and calms.

Apply to damp skin. XO Essence prepares the skin so peptides distribute evenly across high-movement areas.

03
Hydrate
Hydrate Serum
Conditions the surface before peptides.

Apply while skin is still damp. Hydration is the cushion that lets peptides settle into the lines they're built to address.

04
Treat
Firming Serum
Primary peptide treatment.
You are here

Apply after hydration. Patted gently around eyes, lips, and high-movement areas. Neuropeptides work with expression, not against it.

05
Defend
Defense Serum
Protects structure from stress.

Apply after Firming Serum when skin carries environmental load. Reducing daily stress preserves the peptide work underneath.

06
Finish
Protect Oil
THD vitamin C support.

Apply as the treatment finish. 10% THD ascorbate supports collagen pathways alongside the peptide treatment.

07
Protect
Shield SPF 35+
Protects collagen daily.

Apply as the final morning step. UV is the primary cause of collagen breakdown. Protection is non-negotiable for structural results.

Build Around This Step
Choose the next level of commitment: one product, a pair, a starter trio, or the full system.
Protect Oil Finish
Lipid Vitamin C
Protect Oil

The collagen-supportive vitamin C finish after Firming Serum.

$85.00Discover
Firming System Complete
Firming System
Firming System

The full structural sequence: activate, hydrate, firm, defend, seal, finish, and protect.

$475.00View System
2015
Peptides do what peptides do. Slowly. Repeatedly. Only if you keep applying them.
— Daniella Inbar, Founder
The Science

Expression lines form where your face moves most. Peptides soften them without stopping the movement.

01
Dipeptide-2 / Acetyl Tetrapeptide-5
A clinically studied duo that helps reduce visible puffiness and support fluid balance around the eye contour, smoothing signs of fatigue and revitalizing delicate skin. The eye contour's most targeted active, addressing morning puffiness and under-eye creasing that nothing else in a routine typically reaches.
02
Neuropeptide / Expression Relaxer
A biomimetic neuropeptide that helps soften the appearance of expression lines by modulating wrinkle-formation pathways, offering a smoother look without altering natural facial movement. This is the mechanism behind the no-tox positioning: working with the skin's own relaxation pathways rather than interrupting nerve signals.
03
Palmitoyl Tripeptide-5 / Collagen Peptide
A collagen-supporting peptide that improves firmness and elasticity, beneficial for areas prone to early slackening such as the eye contour, lips, and nasolabial folds. Works alongside the neuropeptide to address both surface-level expression lines and the deeper loss of structural support that makes them more visible over time.
04
Dunaliella Salina / Microalgae Carotenoids
A carotenoid-rich microalgae extract that helps defend the skin from oxidative stress and contributes to a firmer, smoother appearance. Provides antioxidant reinforcement in the formula's most delicate application zones, where UV and environmental exposure accelerate the visible signs of expression aging.
From the Treatment Room

Tips
from the spa.

Firming Serum was originally created as a treatment-room essential. Estheticians use it beneath masks to intensify firming results and as a conductive layer for microcurrent, radiofrequency, and ultrasound. Its real legacy comes from the No-Tox Acupuncture Facial: a holistic protocol that smooths, lifts, and revitalizes without injectables. The serum was formulated to amplify those results, making it the booster of choice for clients seeking a refined alternative to Botox treatments, or a way to extend the time between them.

Eye Contour Lift Prep
Apply before Gua Sha or microcurrent around the eyes. The peptides and hydrating sugars help reduce the look of puffiness while creating ideal glide for contouring tools.
Overnight Eye Rejuvenation
At night, layer Firming Serum under Hydrate Serum and finish with Protect Oil to create a moisture-sealing micro-occlusive effect — ideal for crepey lids and under-eye dryness.
Expression Line Refresh
Apply a thin layer of Firming Serum across the forehead and directly over the elevens to deliver targeted peptides where expression lines form. Follow with a layer of C Microemulsion to create ideal glide for cupping. Using the larger facial cup, perform slow, upward strokes beginning at the eyebrow, sweeping over the elevens, and continuing toward the hairline. This gentle suction enhances circulation, disperses stagnation, and amplifies the smoothing effect of the peptides. Finish with Recovery Cream to seal in the treatment.
Lip Plump
Use as a primer before Lip Cream to visibly smooth vertical lip lines and reduce lipstick feathering throughout the day.
The Details

Every question,
answered.

Formulated at Resonance Marin. Tested on real skin. These are the questions that matter most.

Where does Firming Serum fit in the system?
Firming Serum is the primary treatment in the Firming System. Use it after XO Essence and hydration, then follow with Defense Serum, Recovery Cream or Protect Oil, and Shield SPF 35+ in the morning.
How is Firming Serum different from an injectable like Botox?
Firming Serum uses neuropeptides that work with the skin's natural relaxation pathways to soften the appearance of expression lines, without altering facial movement or requiring injections. It's positioned as a no-tox alternative, or a way to extend time between treatments.
Which areas can I use Firming Serum on?
It is designed specifically for the eyes, lips, and nasolabial folds — the areas where skin is thinnest and expression lines form earliest. It can also be used on the forehead and between the brows. For full-face use, do not exceed half a pearl-size in total.
Why does it pill or form a film on my skin?
This happens when the formula is applied to dry skin or in too large a quantity. Always apply over a hydrating base — XO Essence or Hydrate Serum — and use no more than a quarter pearl-size per targeted area. The moisture cushion ensures even peptide distribution and prevents film formation.
Is Firming Serum safe to use around the eyes?
Yes. The formula is completely scent-free and designed specifically for the delicate eye contour area, including eyelids and under-eye. Press gently and tap lightly — do not rub.
When will I see results?
Hydration and reduced puffiness around the eye contour can be visible immediately. Reduction in fine lines, improved firmness, and smoother expression lines develop with consistent AM and PM use over several weeks.
Can I use Firming Serum with other INBAR+co serums?
Yes. It layers cleanly with Hydrate Serum, XO Essence, C Microemulsion, Recovery Cream, and Protect Oil. Apply Firming Serum after water-based serums and before oils or creams.
Can I use Firming Serum under makeup?
Yes. Applied in a thin layer over a hydrating base, it creates a smooth, lifted base that works well under foundation and makeup.
The Scent + Texture
Precision formulated.
Nothing that shouldn't be there.

A silky gel-serum with smooth glide and quick absorption. Designed to press precisely into the thinnest, most mobile skin on the face. Scent-free by design — an intentional choice for eyes, lips, and areas where fragrance has no place.

Scent-FreeTop
Cushiony Gel-SerumHeart
Instant AbsorptionHeart
Precision ApplicationTexture
Full Ingredient List
Every ingredient, listed.

Tap to expand the complete INCI ingredient declaration.

Aqua (Water), Dimethicone, Polysilicone-11, Decyl Glucoside, Polymethylsilsesquioxane/Silica Crosspolymer, Butylene Glycol, Poria Cocos Sclerotium Extract, Dipeptide-2, Acetyl Tetrapeptide-5, Sodium Hyaluronate Crosspolymer, Sodium Hyaluronate, Sodium Acetylated Hyaluronate, Hydrolyzed Sodium Hyaluronate, Pentylene Glycol, Ammonium Acryloyldimethyltaurate/VP Copolymer, Xylitylglucoside, Anhydroxylitol, Xylitol, Saccharide Isomerate, Citric Acid, Sodium Citrate, Palmitoyl Tripeptide-5, Dunaliella Salina Extract, Sodium Benzoate, Potassium Sorbate, Pantolactone, Glycerin, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Panthenol, Phenoxyethanol, Ethylhexylglycerin

Soften the lines. Keep the expression.

Firming Serum is the peptide-led treatment in the Firming System. The no-tox alternative for eyes, lips, and high-movement areas.

$125.00Firming Serum
View Firming System →