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Ranked #13 of 15 Contains a prostaglandin analogue

LiLash Purified Eyelash Serum

A premium-priced serum with one of the shortest ingredient lists in the ranking and a prostaglandin analogue most shoppers will not recognise: dehydrolatanoprost, a derivative of the glaucoma medicine latanoprost.

Tested by the Growth Lash Serum panel · 12-week trial · Last reviewed 13 August 2026 · How we test

Price
£120
Size
4 ml
Cost / month
~£30
Type
Growth serum
Compare all 15 → Read the verdict
LiLash Purified Eyelash Serum bottle
Growth overall score
Prostaglandin analogue: Dehydrolatanoprost
7.0
/ 10

Score breakdown

Efficacy
8.7

Strong results, comparable with the other analogue serums.

Safety
4.6

Capped: isopropyl cloprostenate, listed under a longer chemical name.

Ingredients
7.6

Simple formula — the analogue does nearly all the work.

Value
4.0

£120 for 4 ml. Expensive for what is in the bottle.

The full review

12-week user trial · INCI read line by line

What is in it

A short list — thirteen ingredients — with panthenol, hydrolysed lupin protein and sweet almond extract doing the conditioning. Twelfth is dehydrolatanoprost, a derivative of latanoprost, another licensed glaucoma medicine. It is not one of the three compounds the SCCS named in February 2026, and it is not the isopropyl cloprostenate that older listings for this brand reported — but it is unambiguously a prostaglandin analogue, and there is very little else in the bottle doing any work.

Full ingredient list

Water/Aqua, Caprylyl Glycol, Hydroxyethylcellulose, Glycerin, Chlorphenesin, Panthenol, Hydrolyzed Lupine Protein, Prunus Amygdalus Dulcis Fruit Extract, Silica, Phenoxyethanol, Citric Acid, Dehydrolatanoprost, Ethylhexylglycerin.

How it performed

Strong and comparable with the other analogue serums — visible change from week six, good length by week twelve. Nothing in the results justifies a £120 price against RapidLash at £45 using the same class of active.

Who it is for

Difficult to recommend over cheaper products with the same active. If you are already using it and it suits you, there is no reason to switch; if you are choosing now, the alternatives cost less.

What we liked

✓
Effective — results comparable with other analogue serums
✓
Larger 4 ml bottle

Keep in mind

−
Active is a latanoprost derivative most shoppers will not recognise
−
£120 for the same class of active as a £45 serum
−
Thin supporting formula
The verdict

Ranked #13 of 15

The active works. The unfamiliar ingredient name makes it harder to know that, and the price is difficult to justify against products that do the same thing for a third of the money.

7.0
Growth score

Safety note

This product contains Dehydrolatanoprost. Prostaglandin analogues are associated with darkening of the eyelid skin, loss of fat around the eye socket and, rarely, permanent change to iris colour. Do not start it if you have glaucoma or ocular hypertension, or use prescribed eye drops, without speaking to a clinician. Patch-test first, photograph your eyes for a baseline, and stop if you notice redness, swelling, darkening or any change to your vision.

We review products, we are not clinicians, and this is not medical advice. Ingredient information was taken from the manufacturer's published INCI list on 13 August 2026 — formulas change and brands sell variants under similar names, so check the pack you are holding. If this page is out of date, email us and we will correct it.