Top 10 Best sellers
Cyber Monday
Homepage/ Lashes/ Complex Peptide Lash Serum
  • Complex Peptide Lash Growth Serum - UKLASH
  • Complex Lash and Hair Growth Serum Set - UKLASH
  • Complex Lash and Hair Growth Serum Set - UKLASH
  • Complex Lash and Hair Growth Serum Set - UKLASH
  • Complex Peptide Lash Growth Serum - UKLASH
  • Complex Peptide Lash Growth Serum - UKLASH
  • Complex Peptide Lash Growth Serum - UKLASH
  • Complex Peptide Lash Growth Serum - UKLASH
Prostaglandin-Free
Save 30%
401 reviews

Complex Peptide Lash Serum

Our powerful Compl-hex™ Peptide Blend formula

Complex Peptide Lash Serum

What it does

Our Complex Peptide Lash Serum is one of the most sophisticated peptide-based serums on the market, offering a well-curated blend of six peptides which help to provide longer and fuller-looking lashes.

Why it's special

We've created a world-first Compl-hex™ Peptide Blend including six active peptides, all of which help to stimulate lashes from the root. It promotes collagen and elastin production in the hair follicle to result in longer and fuller-looking lashes

Benefits

World first - The world's first eyelash serum to be powered by a record-breaking six peptides

Easy application - Apply in less than 5 seconds

Clinically tested - Clinically proven results. Approved by dermatologists, ophthalmologists and trichologists

Kind recipe - The vegan-friendly and cruelty-free recipe is derived from 99% natural and 22% organic ingredients

Money-back guarantee - In the unlikely event that you are unhappy with the results after 12 weeks of use, we will give your money back

3ml / 0.10fl oz

Weeks 1–4: Nourishment Begins
The lashes begin to feel nourished and conditioned as the serum strengthens the lash roots, stimulating growth and making them less prone to breakage.

Weeks 4–6: Visible Changes
The lashes start to look longer, healthier and fuller whilst the serum continues to nourish and condition the lashes at the root.

Weeks 6–8: Noticeable Growth
The lashes appear longer and stronger, showing a clear improvement in both volume and length, while the serum continues to nourish and support the lashes entering the growth phase.

Weeks 8–12: Full Results
Full results are achieved with lashes that are healthier, thicker, longer looking, and nourished, as the serum worked to stimulate growth. To maintain these results, use 3–4 times per week.

World first

Record-breaking 6 peptides

Prostaglandin free

Peptide based

Ophthalmologist approved

Kind to your eyes

Trichologist approved

Kind to your hair

Dermatologist approved

Kind to your skin

Vegan friendly

Care for the planet

Oil-free

1. Remove your makeup with an oil-free makeup remover or cleanser

2. Apply one stroke of the serum to your upper lash line with your eye closed, working from the inner corner outwards. One dip is sufficient for both eyes

3. For best results, apply in the PM and allow the serum to work overnight. If applying in the AM - make sure the serum has fully dried before following with your makeup routine

WARNINGS: PATCH TEST BEFORE USE BY APPLYING A SMALL AMOUNT OF SERUM TO CLEAN DRY, SKIN BEHIND YOUR EAR. WAIT 24 HOURS TO CHECK FOR SENSITIVITY. IF IRRITATION OR REDNESS OCCURS, STOP USE AND TRY AGAIN AFTER A FEW DAYS. DISCONTINUE USE IF IRRITATION/ ALLERGIC REACTION PERSISTS. IF THE SERUM GETS INTO YOUR EYES, RINSE WITH WATER. FOR EXTERNAL USE ONLY. KEEP OUT OF REACH OF CHILDREN. IF PREGNANT, NURSING, OR HAVE A MEDICAL CONDITION, CONSULT YOUR HEALTHCARE PROVIDER BEFORE USE.

Compl-hex™ Peptide Blend

(Pea Peptides, Palmitoyl Tetrapeptide-7, Palmitoyl Oligopeptide, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Hexapeptide-8 and Copper Tripeptide-1) - Our unique anti-inflammatory blend of 6 peptides helps to support lash resilience and reduce breakage for the appearance of thicker, fuller lashes.

Hyaluronic Acid

A well-known source of hydration for hair, it also delivers key nutrients to the follicles and roots to promote healthy lash growth

Hydrolyzed Wheat Protein

Hydrates and strengthens the hair follicle reducing hair loss

Aqua, Citrus Limon (Lemon) Fruit Water, Propanediol, Pisum Sativum (Pea) Peptide, Cocodimonium Hydroxypropyl Hydrolyzed Wheat Protein, Butylene Glycol, Hyaluronic Acid, Curcuma Longa (Turmeric) Callus Conditioned Media, Caprylyl Glycol, Acetyl Hexapeptide-8, Pentylene Glycol, Phytic Acid, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Copper Tripeptide-1, 1,2-Hexanediol, Glycerin, Carbomer, Polysorbate 20, Palmitoyl Oligopeptide, Palmitoyl Tetrapeptide-7, Centella Asiatica Extract, Polygonum Cuspidatum Root Extract, Scutellaria Baicalensis Root Extract, Camellia Sinensis Leaf Extract, Glycyrrhiza Glabra (Licorice) Root Extract, Chamomilla Recutita (Matricaria) Flower Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Isochrysis Galbana Extract, Phenoxyethanol, Xanthan Gum, Ethylhexylglycerin.

This serum is Prostaglandin-free.

This product is eligible for our money back guarantee

Faqs

Our Complex Peptide Eyelash Serum is the first of its kind - offering a record-breaking six peptides in its innovative formula. It’s best suited to those looking for longer, healthier and more nourished lashes.

This will depend on what point your lashes are in their cycle when you start to use the product. Some see longer lashes in as little as 25 days, but 12 weeks is when you should expect to see full results. Read more about lash cycles here.

If you have already achieved longer and fuller lashes using our original Eyelash Serum, switching to our innovative Complex Peptide formula can be good as it focuses heavily on nourishing and maintaining length, resulting in healthier and fuller-looking lashes for the long term.

It is packed with 99% naturally derived and 22% organic ingredients including Pea Peptides, Hyaluronic Acid, Hydrolyzed Wheat Protein, Hexapeptide-8 (Acetyl Hexapeptide-8) and Copper Tripeptide-1 amongst many more - all of which combine to moisturise, strengthen and stimulate lash growth from the root.

As leaders in the Eyelash Growth Serum category, we want to make sure we’re catering to all customers in helping achieve longer and fuller-looking lashes. Our original Eyelash Serum was our first innovation, our Sensitive Eyelash Serum caters to those who are looking for a gentler approach to growth, and our new Complex Peptide Eyelash Serum pushes the boundaries by being an industry-first, packed with more peptides than any other serum on the market.

Trusted by Experts

“Using an eyelash serum can help to strengthen your natural lashes, keeping them long and strong and primed for growth ”

Dr. Raj Arora, GP & Medical Educator

“Long-term, aggressive plucking can weaken brow follicles. Go easy, try a UKBROW Eyebrow Serum to encourage growth”

Dr. Kemi Fabusiwa, GP & Medical Educator

“Use deep conditioner often and a shampoo with Piroctone Olamine to protect against dry scalp and hair loss.”

Kate Holden, Trichologist MIT

“Use the Hair Serum for post-sun smoothing, and the Lash Serum to keep lashes strong if you’re skipping mascara.”

Dr. Pyal, GP and Dermatologist
4.5
Rated 4.5 out of 5 stars
Based on 401 reviews
Reviews Summary
Customers say this lash serum makes their eyelashes longer, thicker, and stronger with consistent nightly use. Many report noticeable improvements within weeks, with fuller, more conditioned lashes that often eliminate the need for mascara. Users appreciate that it helps restore lashes damaged by extensions or aging. Several customers mention it's gentler on sensitive eyes compared to other formulas. Some users find the original version more effective than this peptide formula, while others prefer its milder approach. A few customers experienced no results or eye irritation. Most reviews praise the serum's effectiveness for achieving naturally enhanced lashes.
Slide 1 selected
Write a Review (Opens in a new window)
401 reviews
  • Davinia
    Reviewing
    Complex Peptide Lash Growth Serum
    I recommend this product
    Age Range 45 - 54
    What was your concern? Damaged lashes (extensions/ lash lifts)
    How long have you been using the product? 90 days (3 months)
    What improvements have you noticed? Longer lashes, Nourished and hydrated lashes, Stronger lashes
    Rated 5 out of 5 stars
    4 months ago
    Fixed my damaged lashes

    My lashes got damaged by a lash lift and this repaired and lengthened my lashes perfectly. I'm 47 years old and my lashes are the best they have ever been

    Was this helpful?
  • Gabrielle D.
    Verified Buyer
    Reviewing
    Complex Peptide Lash Growth Serum
    I recommend this product
    Age Range 25 - 34
    What was your concern? Sparse lashes
    How long have you been using the product? 150 days (5 months) or more
    What improvements have you noticed? Longer lashes, More Volume, Fuller lashes, Stronger lashes
    Rated 5 out of 5 stars
    9 months ago
    Love It!

    I feel like this is an upgrade from the OG UKLash serum, it doesn’t leave dark circles or dark lines on your eyelids so I’m obsessed. Works super well slightly thicker formula. 10/10

    Was this helpful?
  • Patricia L.
    Verified Buyer
    Reviewing
    Complex Peptide Lash Growth Serum
    I recommend this product
    Age Range 45 - 54
    What was your concern? Short lashes, Sparse lashes
    How long have you been using the product? 60 days (2 months)
    What improvements have you noticed? Longer lashes, Fuller lashes, More Volume
    Rated 5 out of 5 stars
    11 months ago
    Amazing

    I hadn’t worn makeup in years as I had literally about 10 single lashes . Then after a few months of the serum , the cold yeast was massive for me and feel more confident and wanted to wear make bit more. I recommend to everyone I know

    Was this helpful?
  • Julianne A.
    Verified Buyer
    Reviewing
    Complex Peptide Lash Growth Serum
    Age Range 55 - 64
    What was your concern? Short lashes
    How long have you been using the product? 150 days (5 months) or more
    Rated 3 out of 5 stars
    1 year ago
    Not working any more!

    I’ve used uk lash for years and have loved my spectacularly long lashes my pride and joy until it stopped working. I changed to the newer complex peptide to see if it would help and have been using it since it became available with a small improvement but my lashes are still struggling

    Was this helpful?
  • linda c.
    Verified Buyer
    Reviewing
    Complex Peptide Lash Growth Serum
    I recommend this product
    Age Range 55 - 64
    What was your concern? Short lashes, Sparse lashes, Lash loss from hormonal changes (incl postpartum)
    How long have you been using the product? 60 days (2 months)
    What improvements have you noticed? Longer lashes, Fuller lashes
    Rated 5 out of 5 stars
    1 year ago
    Super lash serum

    Seen a difference in the length and strength of my lashes

    Was this helpful?
Save on Sets & Kits
Shop all
  • Lash Growth Serum + Eyebrow Growth Serum Set - UKLASH
    7,373 reviews
    Lash Serum + Eyebrow Serum Set
    For longer-looking lashes & fuller-looking brows
    $90$58.50
  • Lash Growth Serum + Volume Boost Mascara Set - UKLASH
    2,527 reviews
    Lash Serum + Volume Boost Mascara Set
    Our fastest-acting serum + volumizing mascara formula
    $60$39
  • Lash Growth Serum + Tubing Mascara Set - Mocha - UKLASH
    44,821 reviews
    Lash Growth Serum + Tubing Mascara Set
    For growing longer-looking, low-maintenance lashes
    From 
    $70$52.50
    View options
  • Lash Growth Serum + Lengthening Mascara Set - UKLASH
    791 reviews
    Lash Serum + Lengthening Mascara Set
    Our fastest-acting serum + defining mascara formula
    $59.50$38.68
  • Eyebrow Growth Serum Duo Set - UKLASH
    5,877 reviews
    Eyebrow Growth Serum Duo Set
    For fuller & thicker brows
    $90$54
  • Hair Vitamins 90 Day Supply - UKLASH
    2,325 reviews
    Hair Vitamins 90 Day Supply
    For promoting stronger & healthier hair from within
    $67$40.20
  • Complete Lash Kit - UKLASH
    199 reviews
    Complete Lash Kit
    For longer, fuller & lifted lashes
    $69.90$45.44
  • Complex Peptide Lash Growth Serum + Eyebrow Serum Set - UKLASH
    566 reviews
    Complex Peptide Lash Serum + Eyebrow Serum Set
    Our powerful Compl-hex™ Peptide Blend formula for lashes and brows
    $99$59.40
Your bag (0)
Your bag is empty
Your free gift
Find out more