This is what you get
- According to LR, your lashes become measurably longer and denser.
- Each lash gets thicker and stronger, and LR says lash loss is clearly reduced.
- It is hormone-free, with no prostaglandins.
- Its efficacy was tested by Dermatest GmbH, according to LR.
- It takes seconds and works under your make-up, and you can use it on your brows too.
Why do your lashes look thinner than they used to?
Lashes change over time. Years of mascara, waterproof formulas, rubbing tired eyes and taking make-up off in a hurry can leave them short, sparse and quick to break. Many people then look at lash serums and find that some popular ones contain prostaglandin-like ingredients, which they would rather avoid near their eyes.
The LR Signature Lash Serum is hormone-free and contains no prostaglandins. It is aimed at anyone who wants long, strong lashes, even on days without mascara. You apply it to the upper lash line twice a day, and according to LR it stimulates lash growth, makes lashes measurably longer and denser and strengthens them by increasing the thickness of each lash. LR also states that it clearly reduces lash loss.
It fits easily into your routine: you apply it after cleansing in the evening and before your make-up in the morning.
How do you know it’s good quality?
Dermatest GmbH
According to LR, the independent German institute Dermatest GmbH tested the efficacy of the serum in a scientific study. Twenty women applied it twice a day to the upper lash line for 12 weeks (result April 2014), and the study confirmed longer, denser and stronger lashes, according to the manufacturer. LR does not give percentages for the results.
What goes into it?
| Ingredient | Amount | What it does, according to LR |
|---|---|---|
| Red clover extract | not stated | It is rich in isoflavones with antioxidant properties and supports healthy, dense-looking lashes. |
| Provitamin B5 (panthenol) | not stated | It helps lashes hold moisture, keeps them supple and reduces breakage. |
| Biotin peptide and biotin | not stated | They strengthen the hair structure and support lash growth. |
| Caffeine | not stated | It stimulates microcirculation and supports lash growth. |
| Acetyl tetrapeptide-3, arginine | not stated | They are part of the active complex LR names for stimulating lash growth. |
How should you use it?
- Twice a day: apply it every morning and evening after cleansing.
- Where: draw it along the upper lash line, like a thin eyeliner.
- With make-up: you can apply the serum before your make-up in the morning.
- For the brows: make-up artists also apply it to the eyebrows.
- Be patient: the Dermatest study ran for 12 weeks of regular use.
Which Signature eye product goes with it?
| Product | Choose it if… | What it does | Price |
|---|---|---|---|
| LR Signature Lash Serum | you want to care for your lashes over time | hormone-free serum for longer, denser-looking lashes | £41.29 |
| LR Signature Mascara Deep Black | you want volume and definition right now | waterproof, up to 24 hours | £30.40 |
| LR Signature Eyebrow Gel | your brows need shape and fill | tinted gel, up to 12 hours | £21.79 |
| LR Signature Eyeshadow Collection | you want colour on the lids | six matte and shimmer shades | £53.99 |
Is there anything to watch out for?
- It contains alcohol, according to the ingredient list. LR states no other warnings.
- Apply it to the lash line only and keep it out of the eyes themselves.
- This is a cosmetic. If your lashes or brows suddenly fall out, or you are losing hair for medical reasons, speak to your GP rather than relying on a serum.
What do people ask about it?
Is the LR Lash Serum free from prostaglandins?
Yes. LR states that it is hormone-free and contains no prostaglandins.
How long does it take to see results?
In the Dermatest study, women applied the serum twice a day for 12 weeks. Use it regularly for at least that long before you judge the result.
Has it been tested?
According to LR, Dermatest GmbH tested its efficacy on 20 women over 12 weeks and confirmed longer, denser and stronger lashes.
Can I use it on my eyebrows?
Yes. LR mentions applying it to the eyebrows as a make-up artist tip.
Where can I buy the LR Signature Lash Serum in the UK?
LR make-up is not sold in high-street shops or chemists. You buy it in the official LR shop or through LR partners. The button on this page takes you straight to the product in the official LR shop for the UK, where you can order as a guest. Delivery and returns are handled by LR.
Please note: this page contains an affiliate link. We are independent LR partners, and if you order through the button in the official LR shop we may earn a commission. It costs you nothing extra. Ingredients, directions and price are taken from the official LR shop (as of 27/10/2026). The information on the packaging always takes precedence.
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