The full review
12-week user trial · INCI read line by line
What is in it
Two good peptides, biotinoyl tripeptide-1 and myristoyl pentapeptide-17, sit either side of the ingredient that matters: isopropyl cloprostenate, thirteenth on the list. ICP is one of the three compounds the SCCS concluded in February 2026 cannot be considered safe in cosmetic lash products, and it is the analogue most often named in reports of eyelid darkening and orbital fat loss. UKLASH also sells a Complex Peptide line marketed as prostaglandin-free — that is a different product from this one.
Full ingredient list
Aqua, Glycerin, Butylene Glycol, Propanediol, 1,2-Hexanediol, Biotinoyl Tripeptide-1, Camellia Sinensis Leaf Extract, Caprylyl Glycol, Centella Asiatica Extract, Chamomilla Recutita Flower Extract, Ethylhexylglycerin, Glycyrrhiza Glabra Root Extract, Isopropyl Cloprostenate, Myristoyl Pentapeptide-17, Panthenol, Polygonum Cuspidatum Root Extract, Rosmarinus Officinalis Leaf Extract, Scutellaria Baicalensis Root Extract, Tocopherol, Xanthan Gum, Benzoic Acid, Phenoxyethanol, Sodium Benzoate.
How it performed
Fast. Visible change from week five for most testers, with clear length by week twelve. Two testers reported early stinging. On results alone it would sit near the top of this ranking; on our scoring the analogue costs it five places.
Who it is for
People who have specifically decided they want an ICP serum and want the cheapest credible one. Not for anyone with glaucoma, on prescribed eye drops, pregnant, breastfeeding, or with light-coloured irises. If you bought UKLASH believing it was peptide-only, check which line you have.