A clear glass dropper bottle of Liquid Peptides serum is presented, with its dropper removed and resting beside it and serum droplets, showing the texture.
Woman is applying Liquid Peptides serum with a dropper to their face. To the left, text states "VISIBLE RESULTS IN JUST 7 DAYS*" and lists benefits: wrinkles smoothed, youthful-looking skin, improved skin firmness, increased skin plumpness, hydration restored. A footnote indicates the claims are proven via an independent consumer study.
A woman holds a bottle of Liquid Peptides serum. Text on the right states, "Proven to smooth the look of fine lines and wrinkles in just 7 Days*." A footnote states this is from an independent consumer study.
A close-up of the liquid peptides serum within a dropper. Text callouts highlight key ingredients: MATRIXYL® 3000". DRONE-TARGETED COPPER PEPTIDE, CARNOSINE, EXPRESSION LINE PEPTIDE.
A clear glass dropper bottle of Liquid Peptides serum and a tube of Eyelift Peptides are shown. Text states, DISCOVER POWERFUL WRINKLE-REDUCING RESULTS for both the face & delicate eye area by pairing Liquid Peptides with Eyelift Peptides.
A "HOW TO LAYER" diagram. The AM routine includes Cleanse (Surface Radiance Cleanse), Target (Liquid Peptides), Vitamin C (C-Tetra), and Sunscreen (Advanced Day Total Protect). The PM routine involves Cleanse (Lipid-Balance Cleansing Oil), Target (Liquid Peptides), Vitamin A (Crystal Retinal), and Moisturise (Advanced Night Restore).
A clear glass dropper bottle of Liquid Peptides serum stands in front of its white product carton.
A small clear glass bottle (8mL) of Medik8 Liquid Peptides serum, with its dropper resting beside it. Text indicates it's "ALSO AVAILABLE IN A HANDY TRAVEL SIZE.
A before-and-after close-up of an eye and forehead area, showing visibly smoother skin in the circled section in the "After 7 Days" image compared to the "Before" side. Text highlights "Younger-looking skin in just 7 Days*". A bottle of Medik8 Liquid Peptides serum is shown in the corner alongside clear liquid bubble graphics.
A before-and-after close-up of a forehead, showing smoother skin in the circled area in the "After 28 Days" image compared to "Before." Text states "98% agree formula is instantly hydrating*". A bottle of Medik8 Liquid Peptides serum is displayed in the corner against a background of clear liquid bubbles.
A clear glass dropper bottle of Liquid Peptides serum is presented, with its dropper removed and resting beside it and serum droplets, showing the texture.
Woman is applying Liquid Peptides serum with a dropper to their face. To the left, text states "VISIBLE RESULTS IN JUST 7 DAYS*" and lists benefits: wrinkles smoothed, youthful-looking skin, improved skin firmness, increased skin plumpness, hydration restored. A footnote indicates the claims are proven via an independent consumer study.
A woman holds a bottle of Liquid Peptides serum. Text on the right states, "Proven to smooth the look of fine lines and wrinkles in just 7 Days*." A footnote states this is from an independent consumer study.
A close-up of the liquid peptides serum within a dropper. Text callouts highlight key ingredients: MATRIXYL® 3000". DRONE-TARGETED COPPER PEPTIDE, CARNOSINE, EXPRESSION LINE PEPTIDE.
A clear glass dropper bottle of Liquid Peptides serum and a tube of Eyelift Peptides are shown. Text states, DISCOVER POWERFUL WRINKLE-REDUCING RESULTS for both the face & delicate eye area by pairing Liquid Peptides with Eyelift Peptides.
A "HOW TO LAYER" diagram. The AM routine includes Cleanse (Surface Radiance Cleanse), Target (Liquid Peptides), Vitamin C (C-Tetra), and Sunscreen (Advanced Day Total Protect). The PM routine involves Cleanse (Lipid-Balance Cleansing Oil), Target (Liquid Peptides), Vitamin A (Crystal Retinal), and Moisturise (Advanced Night Restore).
A clear glass dropper bottle of Liquid Peptides serum stands in front of its white product carton.
A small clear glass bottle (8mL) of Medik8 Liquid Peptides serum, with its dropper resting beside it. Text indicates it's "ALSO AVAILABLE IN A HANDY TRAVEL SIZE.
A before-and-after close-up of an eye and forehead area, showing visibly smoother skin in the circled section in the "After 7 Days" image compared to the "Before" side. Text highlights "Younger-looking skin in just 7 Days*". A bottle of Medik8 Liquid Peptides serum is shown in the corner alongside clear liquid bubble graphics.
A before-and-after close-up of a forehead, showing smoother skin in the circled area in the "After 28 Days" image compared to "Before." Text states "98% agree formula is instantly hydrating*". A bottle of Medik8 Liquid Peptides serum is displayed in the corner against a background of clear liquid bubbles.
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Liquid Peptides™

  • Smooth
  • |
  • Firm
  • |
  • Plump
30% Complex Multi-Peptide Age-Defying Serum

Clinically proven to visibly smooth fine lines in just 7 days.* 

Liquid Peptides is a targeted daily peptide serum for the first signs of ageing. Expertly formulated with 10 powerful peptides in a 30% blend, to help slow & prevent fine line formation. 

This supercharged serum supports the skin's natural age-defying functions and features drone-targeted technology to deliver our unique blend of potent peptides where they’re needed most in the skin - for maximum visible benefits. 

Say 'no' to fine lines and 'yes' to a visibly smooth, plump and hydrated complexion.
Select a Size
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Reasons to shop Medik8

Free UK delivery over £25
15% off your first order
"No questions asked" easy 30 day returns
A silver pump tube of Medik8 Crystal Retinal 6 resting on a diagonal swatch of its peach-coloured cream against a clean white background. Text on the right features a silver wreath badge reading "WINNER OF 45+ GLOBAL AWARDS" and claims it is the "No.1 Retinal SERUM WORLDWIDE."
Crystal Retinal®
  • Renew
  • |
  • Firm
  • |
  • Smooth
 Award-winning Age-Defying Vitamin A Night Serum
Select a Strength
Key Benefits
All-in-One Youth-Boosting Effect

Fine lines are visibly reduced as the lightweight serum plumps, firms and refines the look of uneven skin texture.

Peptide Power Where Your Skin Needs It Most

Innovative, drone-targeted technology ensures each powerful peptide is delivered where it’s needed most - for maximum visible results.

Effective Hydration

Proven to leave the skin feeling deeply hydrated by helping to boost hyaluronic acid levels within the skin.

Age-Defying Results Booster

Perfectly complements the visible age-defying results of Medik8’s proven CSA Philosophy; vitamin C plus sunscreen by day, vitamin A by night.

Proven Results
Text
Text
7 days to improved skin firmness & plumpness*
7 days to visible fine line & wrinkle reduction*
7 days to younger-looking skin*
98% agree Liquid Peptides is gentle on the skin*
97% experienced long-lasting hydration*
*Proven via independent consumer study on Liquid Peptides on 60 participants over 8 weeks. | Please Note: Product packaging shown may be different to the product received due to regional variations.
How to Use

First-time use

If you're new to Liquid Peptides, we recommend a patch test at least 24 hours before first use. Learn how to patch test here.


Step 1

After cleansing in the morning and evening, massage 6 drops of Liquid Peptides across the face, neck and décolletage.


Step 2

Leave to absorb before applying moisturiser. We recommend Total Moisture Daily Facial Cream.

Uses per bottle

80
Guide to Layering
Step 1: Cleanse
Medik8 Surface Radiance Cleanse tube displayed on a clean white background with a large, translucent gel texture smear. Text identifies it as a Resurfacing AHA/BHA Mangosteen Cleansing Gel in a 150mL size.
Morning
Evening
Surface Radiance Cleanse™
Select a Size
Step 2: Brighten
Medik8 C-Tetra Advanced bottle displayed on a clean white background with translucent serum droplets, highlighting its lightweight gel-serum texture.
Morning
C-Tetra® Advanced
Full Size (30ml)
Step 3: Target
A clear glass dropper bottle of Liquid Peptides serum is presented, with its dropper removed and resting beside it and serum droplets, showing the texture.
Morning
Evening
Liquid Peptides™
Select a Size
Step 4: Renew
A silver pump tube of Medik8 Crystal Retinal 6 resting on a diagonal swatch of its peach-coloured cream against a clean white background. Text on the right features a silver wreath badge reading
Evening
Crystal Retinal®
Select a Strength
Step 5: Moisturise
Medik8 Advanced Night Restore cream jar shown open with a rich dollop of white cream peaked on top against a clean white background, highlighting its smooth, restorative texture. Black text on the jar reads
Evening
Advanced Night Restore™
Select a Size
Key Ingredients
Matrixyl® 3000 (pronounced 'ma-TRIX-ul 3 thousand')

A combination of peptides which 'trick' the skin into producing more collagen for visible firming, plumping and wrinkle-smoothing results.

Drone-Targeted Copper Peptide

Encapsulated in a polymer system, it dives through the layers of the skin to specifically support collagen-producing cells.

Expression Line Peptide

An innovative peptide which works to tackle the appearance and formation of fine lines by helping to block the pathway that leads to facial muscle contraction. This leaves the skin visibly smoother and more youthful-looking.

Carnosine (pronounced 'CAR-no-seen')

A protective peptide that is naturally produced in the body, carnosine helps to block skin-damaging sugars from binding to collagen in the skin, therefore minimising the visible formation of the first signs of ageing.

Expression Line Peptide

An innovative peptide which works to tackle the appearance and formation of fine lines by helping to block the pathway that leads to facial muscle contraction. This leaves the skin visibly smoother and more youthful-looking.

Carnosine (pronounced 'CAR-no-seen')

A protective peptide that is naturally produced in the body, carnosine helps to block skin-damaging sugars from binding to collagen in the skin, therefore minimising the visible formation of the first signs of ageing.

Multi-Weight Hyaluronic Acid

With the ability to attract and retain more than 1,000 times its own weight in water, multi-weight hyaluronic acid draws moisture into multiple layers of the skin; leaving the complexion deeply hydrated and visibly supple.

Full List of Ingredients
Liquid Peptides™
30% Complex Multi-Peptide Age-Defying Serum

Aqua (Water), Glycerin, Butylene Glycol, Inulin, Sodium Hyaluronate, Panthenol, Alpha-Glucan Oligosaccharide, Carnosine, Carbomer, Polysorbate 20, Caprylyl Glycol, Phenoxyethanol, Hydroxypropyl Cyclodextrin, Dunaliella Salina (Green Algae) Extract, Ethylhexylglycerin, Citric Acid, Palmitoyl Tripeptide-5, Sodium Benzoate, Acetyl Hexapeptide-8, Tetrapeptide-21, Pentapeptide-18, Palmitoyl Tripeptide-1, Pantolactone, Palmitoyl Tripeptide-38, Palmitoyl Tetrapeptide-7, Glyceryl Caprylate, Lactic Acid/Glycolic Acid Copolymer, Polyvinyl Alcohol, Phenylpropanol, Copper Palmitoyl Heptapeptide-14, Heptapeptide-15 Palmitate, Potassium Sorbate, Xanthan Gum.

*Although we try our best to ensure this list of ingredients is accurate there may be product upgrades from time to time, or slight variants between different regions based on local laws, meaning the only definitive ingredient list is that which is printed on the product packaging.
  • Fragrance free
  • No synthetic colours
  • Paraben free
  • Alcohol free
  • Certified by the vegan society
Expert Recommended

"Liquid Peptides takes the renowned benefits of peptides to the next level."

DANIEL ISAACS
Chief Product Officer
A circular headshot portrait of a man with light brown hair and green eyes, smiling neutrally. He is wearing a white lab coat with 'Medik8' embroidered on the pocket and a black button-up shirt. The background is white.

"One of the finest formulations you’ll find!"

HANNAH COATES
Beauty & Wellness Editor - British Vogue

Find Your Serum

Exo-PDRN Prismatic+
Morning
Evening
Exo-PDRN Prismatic+
Full size (30ml) | £79
Suitable for

All skin types

Texture

Water-based serum

Benefits
  • Rejuvenate
  • Plump
  • Illuminate
Engineered To

Helps to restore visible vitality, refine tone and texture, boost luminosity and support calm, resilient-looking skin

Key Ingredients
  • Prismatic PDRN
  • Triple Exosome Complex
  • GF MiniProteinTM
  • ATP Precursor
Liquid Peptides Advanced MP
Morning
Evening
Liquid Peptides Advanced MP
Full Size (30ml) | £82
Suitable for

All skin types

Texture

Emulsion-based serum

Benefits
  • Lift
  • Plump
  • Age-Defy
Engineered To
  • Expression Line MiniProteinTM
  • GF MiniProteinTM
  • 30% Multi-Peptide Complex
Key Ingredients

Visibly reduce expression lines and deep-set wrinkles for smoother, more youthful-looking skin with breakthrough Dual MiniProteinsTM

A clear glass dropper bottle of Liquid Peptides serum is presented, with its dropper removed and resting beside it and serum droplets, showing the texture.
Morning
Evening
Liquid Peptides™
Full Size (30ml) | £59
Suitable for

All skin types

Texture

Water-based serum

Benefits
  • Smooth
  • Firm
  • Plump
Engineered To
  • Matrixyl® 3000
  • Drone-Targeted Copper Peptide
  • Expression Line Peptide
  • Carnosine
  • Multi-Weight Hyaluronic Acid
Key Ingredients

Visibly smooth and firm skin while targeting the first signs of ageing

Medik8 Niacinamide Peptides serum bottle with a white pump top, resting on a white surface with a smear of white serum behind it.
Morning
Evening
Niacinamide Peptides
Full size (30ml) | £49
Suitable for

Blemish prone skin

Texture

Emulsion-based serum

Benefits
  • Clarify
  • Soothe
  • Hydrate
Engineered To

Visibly clarify and refine the look of pores while smoothing congested skin texture

Key Ingredients
  • Niacinamide (10%)
  • 3% Crystalide™ Peptide
  • N-Acetyl Glucosamine (NAG)
  • 1% Zinc PCA
  • Hyaluronic Acid



Two small white bottles of Oxy-R Peptides serum are displayed. A black dropper tool lies nearby, and two drops of yellow serum are visible on the white surface
Morning
Evening
Oxy-R Peptides™
Full Size (2 x 10ml) | £65
Suitable for

All skin types

Texture

Water-based serum

Benefits
  • Even
  • Hydrate
  • Brighten
Engineered To

Deliver professional strength brightening and visibly even skin tone while targeting dark spots and discolouration

Key Ingredients
  • 1% Oxyresveratrol (Oxy-R)
  • Tetrapeptide-30
  • Acetyl Glycyl Beta-Alanine
  • Hyaluronic Acid
A purple glass dropper bottle of Bakuchiol Peptides serum, with its dropper removed. A swirl of the serum is shown, emphasising the product's texture.
Morning
Evening
Bakuchiol Peptides™
Full Size (30ml) | £55
Suitable for

All skin types

Texture

Water-based serum

Benefits
  • Calm
  • Even
  • Renew
Engineered To

Smooth visible fine lines while improving overall skin tone and texture

Key Ingredients
  • Bakuchiol (1.25%)
  • Brightening Peptide Precursors
  • Centella Asiatica
  • ​Inka Omega Oil

Complete Your Regime

Reviews

Frequently Asked Questions

Can I use Liquid Peptides alongside Crystal Retinal?
Absolutely. Liquid Peptides and Crystal Retinal are the perfect nighttime pairing to take your visible wrinkle-reducing results to the next level.
Can I use Liquid Peptides directly after an exfoliating acid like Press & Glow or Press & Clear?
Yes. Liquid Peptides can be applied straight after an exfoliating acid, in both your AM and PM routines.
Can I use Liquid Peptides during pregnancy?
As general guidance, this product does not contain any ingredients which we would recommend to avoid during pregnancy, unless advised by your doctor.
Should I apply Liquid Peptides in the morning or evening?
Both. Liquid Peptides can be applied both morning and night for optimal visible results. Apply after cleansing and toning but before oil-based serums and moisturisers.
Liquid Peptides™
Full Size (30ml)
Select a Size