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5.0 , 9 reviews
New

Definitive Renewal Serum

Collagen-targeting peptide complex

A revolution in Liquid Oxygen skincare, this skin firming and renewing serum is diverse in its power to revitalise and enhance cellular functions in all skin types.

Engineered for skincare routines of every kind, and formulated with the very best peptides for collagen production and cellular communication, this universal serum gently restores hydration and nourishment with Niacinamide and Squalane, whilst Liquid Oxygen breathes new life into cells to accelerate repair, boost collagen production and elevate luminosity.

With daily morning and evening application, skin swiftly becomes firmer, smoother, and more balanced, with radiance increased, and fine lines and wrinkles reduced.

Size:

Features

Features

Cellular Renewal
70
7/10
Collagen Support
80
8/10
Firmness & Elasticity
70
7/10
Skin Density & Volume
80
8/10
Barrier Strengthening
50
5/10
Hydration
70
7/10
Radiance / Brightening
50
5/10
Even Skin Tone
60
6/10
Texture Refinement
60
6/10
Line & Wrinkle Reduction
70
7/10

Active Ingredients

Active Ingredients

Gold Pro-Collagen Peptide

Next-generation peptide complex that enhances collagen synthesis, delivering firmer, more lifted skin while improving elasticity.

Growth Factor Tripeptide

Mimics the body’s natural collagen production process via TGF-β, protecting collagen from degradation and restoring a smoother, firmer appearance.

Liquid Oxygen

Optimises oxygen delivery to skin cells, accelerating repair and regeneration while boosting collagen production and luminosity.

Niacinamide

Reveals brighter, more even skin while reinforcing the barrier and minimising visible pores, fine lines, and discoloration.

Squalane

Powerful natural antioxidant that balances oil production, fights free radical damage, and adds lightweight moisture to the skin.

Ingredients

Aqua/Water, Pentylene Glycol, Glyceryl Stearate Citrate, Perfluorohexane, Squalane, Niacinamide, Glycine Soja Oil, Caprylic/Capric Triglyceride, Glycerin, Sodium Lactate, Sodium PCA, Xanthan Gum, Glyceryl Stearate SE, Lactic Acid, Sodium Stearoyl Glutamate, Perfluorodecalin, Pentafluoropropane, Sodium Hyaluronate, Butyrospermum Parkii Butter

Ceramide Np, Monarda Didyma Leaf Extract, Tocopherol, Phospholipids, Helianthus Annuus Seed Oil, Adansonia Digitata Fruit Extract, Propanediol, Leuconostoc/Radish Root Ferment Filtrate, Sodium Citrate, Caprylyl Glycol, Palmitoyl Tripeptide-5, Citric Acid, Vaccaria Segetalis Extract, Maltodextrin, Phenylpropanol, Acetyl Hexapeptide-8, Tetrasodium EDTA, Acetyl Heptapeptide-9, Colloidal Gold.

How to use

How to use

When

  • May be used twice daily, morning and evening

How

  • Apply 1-2 pumps to the face, and an additional pump to the neck and décolleté
  • Allow to absorb fully before following with cream

Expert guidance

  • Perfectly compliments Composition No. 1 in a more advanced routine. Integrate Renewal Serum on opposite evenings, or as part of a morning regime
  • The most versatile advanced serum for optimising a diverse range of cellular functions, Renewal Serum delivers brightening, refining, and restores a smoother and more supple finish
  • Finish with a rich cream for more dry or sensitive skin types
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Discover transformative
active ingredients

Discover the advanced collagen-activating peptides that intelligently mimic the body’s own mechanisms to produce, protect and stabilise collagen within the skin.

SEE ALL INGREDIENTS
  • Gold Pro-Collagen Peptide

    How it works

    Next-generation peptide complex that enhances collagen synthesis, delivering firmer, more lifted skin while improving elasticity.

  • Growth Factor Tripeptide

    How it works

    Mimics the body’s natural collagen production process via TGF-β, protecting collagen from degradation and restoring a smoother, firmer appearance.

  • Liquid Oxygen

    How it works

    Optimises oxygen delivery to skin cells, accelerating repair and regeneration while boosting collagen production and luminosity.

  • Niacinamide

    How it works

    Reveals brighter, more even skin while reinforcing the barrier and minimising visible pores, fine lines, and discoloration.

  • Squalane

    How it works

    Powerful natural antioxidant that balances oil production, fights free radical damage, and adds lightweight moisture to the skin.

Discover transformative
active ingredients

Discover the advanced collagen-activating peptides that intelligently mimic the body’s own mechanisms to produce, protect and stabilise collagen within the skin.

Gold Pro-Collagen Peptide

How it works

Next-generation peptide complex that enhances collagen synthesis, delivering firmer, more lifted skin while improving elasticity.

Growth Factor Tripeptide

How it works

Mimics the body’s natural collagen production process via TGF-β, protecting collagen from degradation and restoring a smoother, firmer appearance.

Liquid Oxygen

How it works

Optimises oxygen delivery to skin cells, accelerating repair and regeneration while boosting collagen production and luminosity.

Niacinamide

How it works

Reveals brighter, more even skin while reinforcing the barrier and minimising visible pores, fine lines, and discoloration.

Squalane

How it works

Powerful natural antioxidant that balances oil production, fights free radical damage, and adds lightweight moisture to the skin.
SEE ALL INGREDIENTS

The staple serum that performs essential soothing, smoothing, balancing and hydrating functions to the optimal degree, for firmer, more even skin.

Featuring Gold Pro-Collagen Peptide for regeneration and repair

Within this serum, oxygen is composed in liquid form to penetrate the skin transdermally, optimising and accelerating cellular metabolism and collagen production with its anti-inflammatory, rejuvenating and reparative properties.

01

Reduces the appearance of dynamic lines

Skin exhibits a smoother finish as lines are relieved and inhibited

02

Firms the skin

Skin becomes firmer as its own growth factor beta and collagen synthesis is enhanced

03

Restores hydration and balance

Hydration in all skin types is gently yet deeply restored to its optimal level

04

Enhances overall skin health

Skin’s healing and reparative functions are optimised with Liquid Oxygen, whilst Niacinamide performs a multitude of nourishing actions

Featuring Gold Pro-Collagen Peptide for regeneration and repair

Within this serum, oxygen is composed in liquid form to penetrate the skin transdermally, optimising and accelerating cellular metabolism and collagen production with its anti-inflammatory, rejuvenating and reparative properties.

Up to

-55%

Wrinkle reduction in 4 weeks. Double-blind, randomized in vivo test on 15 women (35–60 years old), using 0.3% Golden Pro-Collagen Peptide twice daily 

Up to

20×

More potent than free peptide. In vitro testing on human dermal fibroblasts: Golden Pro-Collagen increased collagen I & III synthesis at least 20× compared with non-conjugated peptide

Up to

90%

Peptide stability after 24h. Free peptides degrade completely in 3 hours, while Golden Collagenine preserves over 90% of peptides active after 24 hours (enzymatic degradation test).

Advanced wrinkle reduction and firm, supple skin

In a 28-day clinical trial of Gold Pro-Collagen Peptide, participants aged 35-60 experienced a wrinkle reduction of up to 55% with twice-daily application.

STANDARD ANTI-AGING SERUM

Definitive Renewal Serum

Standard peptides with limited activity

Advanced collagen-targeting peptide complex visibly firms and strengthens

Superficial plumping of fine lines

Neuropeptides reduce dynamic lines at the source

Temporary plumping, minimal firming

Reduces dynamic lines, restores balance, enhances radiance

Limited lifting effect beyond temporary

Collagen synthesis and growth factor beta stimulation

explore science
DAY 0
DAY 28

STANDARD ANTI-AGING SERUM

Standard peptides with limited activity

Superficial plumping of fine lines

Temporary plumping, minimal firming

Limited lifting effect beyond temporary

Definitive Renewal Serum

Advanced collagen-targeting peptide complex visibly firms and strengthens

Neuropeptides reduce dynamic lines at the source

Reduces dynamic lines, restores balance, enhances radiance

Collagen synthesis and growth factor beta stimulation

explore science

Definitive Collection
Serum Finder

Composition No. 1
Renewal Serum
Line Serum
Retinol Serum
Hyaluron Activator
Collagen Activator
Light Hydration
Intensive Hydration
Advanced Wrinkle Repair
Brightens and Evens Tone
Refines Texture
Antioxidant Protection
Promotes Collagen Regeneration
Contains Retinol
Liquid Oxygen Complex
Myo-relaxant Peptides (Instantly reduce surface lines)
AFTER 4 WEEKS
  • Visibly reduces lines and wrinkles 
  • Promotes firmer, denser skin through collagen and elastin stimulation
  • Refines skin tone and texture for a more even, radiant complexion
  • Boosts cellular renewal to restore vibrancy and resilience

"After a month, I feel like my skin looks brighter and more even, and I've seen an improvement in laxity."

Before
After

Images taken weeks apart with nightly use

"After a month, I feel like my skin looks brighter and more even, and I've seen an improvement in laxity."

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Editorial Features

If You Like Glowy, Dewy Skin, This Ultra-Luxe Brand Is Your New Secret Weapon

“I noticed that after applying it for just a few days, my skin felt noticeably tighter and more hydrated. The fine lines I'm most concerned about are my laugh lines since my skin can get pretty dehydrated, but I've already noticed an improvement in those after just a few weeks of use. The other brightening and hydrating ingredients also give you a serious glow.”

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AUTEUR is the skincare brand the experts are watching

“The German skincare brand, beloved by aestheticians, activates your skin’s own best function and appearance . Featuring over 100 active ingredients from around the world, all working in synchrony to accelerate cellular repair, German skincare brand AUTEUR is delivering next level results with its product line. Its encapsulated peptide delivery systems offer enhanced bioavailability and repair capabilities and lower weight molecular densities for better ingredient absorption.”

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These Are The Best Skin Care Products, According to Vogue Editors

“It feels like the Hermès of skin care for the price and quality, though the products don’t have to be used every day (or night, which I prefer) to work, and the Definitive Hyaluron Activator Serum in this Hydrate set seems to already be a star for mirror-finish skin.”

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Explore more

Book a consultation

Schedule a consultation with our expert who will find the right routine skincare for you.

Book a consultation

The Definitive
Collection

High-active compositions elevating regenerative skincare to an art form - and your deepest authentic beauty to the surface

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Definitive Enzyme Cleanser
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Brightening and exfoliating treatment

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Definitive Eye Cream
$420.00
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Multi-faceted eye renewal treatment

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Definitive Neck and Décolleté Cream
$340.00
$340.00

Rich cream for restoration and repair

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Definitive Renewal Serum
$390.00
$390.00

Collagen-targeting peptide complex

FAQ

How does Renewal Serum work?

The formula combines encapsulated lactic and glycolic acids with growth factor–mimicking peptides, antioxidants, and hydrating actives. The acids dissolve the bonds between dead skin cells, revealing smoother, brighter skin beneath. Growth factor–mimicking peptides stimulate skin’s natural repair processes and support collagen renewal, while antioxidants and ceramides reinforce the barrier to keep skin balanced.

How is Renewal Serum different from Retinol Serum?

Retinol Serum works primarily through retinoid receptors to accelerate cell turnover and refine texture. Renewal Serum uses exfoliating acids for resurfacing, supported by growth factor-mimicking peptides and barrier-strengthening actives for hydration and repair. Retinol Serum is best for targeting lines, wrinkles, and overall firmness; Renewal Serum excels at improving texture, radiance, hydration, and more advanced collagen support.

How is Renewal Serum different from Composition No. 1?

Composition No. 1 is a multi-corrective treatment for deep structural repair. Renewal Serum, by contrast, is gentler, focusing on resurfacing with acids and skin regeneration through growth factor–mimicking peptides. Renewal Serum can typically be used more frequently in a daily routine, and can be alternated with Composition No. 1 to create a balanced evening routine.

Can Renewal Serum be layered with other serums?

Yes. Renewal Serum pairs well with other serums. It can be applied over Line Serum (for additional tightening and improvements in laxity and surface lines). It should not be combined in the same routine with Retinol Serum or Composition No. 1 to avoid over-exfoliation.

Is Renewal Serum suitable for sensitive skin?

Yes, but start gradually. Those with reactive skin may prefer to apply 2–3 times per week before moving to more frequent use.

Find your routine

Still unsure? Take our quiz to discover which Auteur products are right for you.

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Definitive Renewal Serum

Collagen-targeting peptide complex
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