FREQUENTLY ASKED QUESTIONS

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What is Lashfactor Rapid Growth Serum?

Lashfactor serums are a chemical-free and sterile solution, created with advanced nano-molecular growth formula for the best results. Our serum enhances the appearance of eyelashes and eyebrows, making them bigger and bolder while maintaining the ‘natural look’. We inspire and create growth!

Who are we?

We started as an ophthalmic company and have translated our experience to the cosmetic world with a rapid growth serum for eyelashes and eyebrows. We used our knowledge, forty-plus years’ worth, from the development and production of ocular products to create a versatile growth serum with meaningful results. Mainly run by pharmaceutical scientists and clinical pharmacists, we take formulations and quality assurance very seriously. We understand the science to take growth serum to the next level and that is why we are strong advocates for advanced nano-technology in our serums.

Who is Lashfactor for?

Lashfactor serum is for all types of eyelashes and eyebrows - especially for inadequate and lack of hair in those areas.

How does it work and how do I use it?

Apply Lashfactor serum firmly along the roots of upper/lower eyelids and across the middle of your eyebrows. Simple. We recommend applying our serum at night-time, just before bed to clean skin for best hygienic results. We use an innovative formula which is semi-viscous and clear, containing volume building nano-polymers and hair pigmenting agents in buffered sterile water for better results. 

How is Lashfactor’s applicator different from other growth serums?

Traditional brush-based applicators typically interfere with the solution from shedding and picking up unwanted dirt/debris from skin - which goes back into the solution and increases the risk of irritation or infection. We designed a brush-free applicator, made from over 1,000 extremely delicate biocompatible micro-bristles to maintain hygiene, minimise waste of solution and protect eyelashes/eyebrows during application.


  • Brush-free
  • Designed for daily use - precise and consistent application
  • Anti-shedding
  • Hygienic
  • Safe and biocompatible
  • Protects sterility
  • Maximum efficiency of serum

When will I see results?

Noticeable results begin in week 2, with the best results occurring in week 4 to 6. 84% of 100 participants in a consumer panel testing rated their eyelash length positively after using Lashfactor Rapid Growth Serum after 4 weeks of use. With 80% of participants rating the overall prominence of their eyelashes positively. Depending on eyelash and eyebrow condition, our rapid growth serum may take longer (up to 16 weeks) due to long-term use of eyelash extensions, for example.

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What is the difference between the Eyelash and the Lash + Brow Serum?

Lash + Brow is a stronger variant of the original serum, allowing it to cover both the eyelashes and eyebrows due to its long-lasting formula.

How long does a bottle of Lashfactor serum last?

Lashfactor Rapid Growth Serums come in 2ml bottles - convenient for traveling. Lashfactor Eyelash Serum will last for approx. 4 weeks and Lashfactor Lash + Brow will last for approx. 2 weeks.

Are Lashfactor serums safe?

Yes - we are safe!


We are...

  • Ophthalmologist and Dermatologist-tested
  • Clinically proven
  • Safe for the skin, eyes, and hair
  • 100% sterile
  • Free-from Parabens, Phthalates and Sulphates
  • Hypoallergenic
  • Suitable for sensitive skin
  • Fragrance and colourant-free


Our recommendations

  • Wipe any excess serum from the skin to avoid unwanted hair growth
  • Remove contact lenses before applying serum
  • Wipe immediately if solution enters the eye
  • Do not use if hypersensitive to Bimatoprost, or any other ingredient [see ingredients below]


If you need any assistance before purchase concerning your suitability, please get in touch with our helpful customer service team at Lashfactor HQ. We will answer your question within 3 hours from Monday to Friday, 10 am - 6 pm (BST). Please allow 24-48 hours during weekends and holiday periods.

Will Lashfactor irritate my eyes or skin?

Our serums have been tested by Ophthalmologists and Dermatologists - safe for the eyes, skin, and hair. It is very uncommon for our serum to be irritable for skin or eyes. Before using Lashfactor serum, we highly recommend following the application instructions which can be found on our website and only stick to the roots of eyelashes and the middle space of eyebrows. Unwanted hair growth may appear close to applied areas - please use a sterile wipe after application if there is spillage.

Can I use Lashfactor Eyelash Serum if I have extensions in?

We strongly recommend to apply as close to the lash line as possible and avoid the bonding glue when using Lashfactor serum with eyelash extensions. If you can do that, it is safe.

What are the ingredients?

Lashfactor Eyelash Serum

Bimatoprost 0.03% w/v, Benzalkonium Chloride Solution BP 0.02% v/v (As Preservative), Aqueous Buffered Vehicle q.s. 


Lashfactor Lash + Brow Serum 

Hydroxypropyl Methylcellulose BP 0.7% w/v, Glycerine 0.2% w/v, Benzalkonium Chloride Solution BP 0.02% v/v (As Preservative), Aqueous Buffered Vehicle q.s. 

ORDERING & SHIPPING

What are my payment options?

We accept all major credit and debit cards, as well as PayPal.

How do I use my coupon code?

 Before check out, enter your coupon code at the bottom left of the page. Alternatively, you can apply your coupon code during check out too.

I just ordered it. When will I receive my item(s)?

We aim to dispatch orders within 3 working days. In most cases, orders are dispatch on the same day if placed before 3 pm. Orders placed after 3 pm are processed the following day. Please note, orders placed on the weekend will be processed on the following Monday. Bank holiday orders are processed the next working day. Once dispatched, your order should be delivered within 2 to 3 working days.

How will my order be shipped?

We use Royal Mail tracked services.

And how do I track my order?

Use Track and Trace to track your items once you have received tracking information from us.

Do you ship internationally?

Currently, we only ship to the UK from our website. and Amazon. Lashfactor is also available in Italy, Spain, Germany, and France on Amazon marketplaces.