Nanolash Eyelash Serum

Packaging and what the product is

The serum comes in a slim tube with a fine brush applicator, shown in the quoted photo from the manufacturer; it is applied once a day along the upper lash line. The marketing promise is longer, thicker lashes within weeks.

Ingredient analysis

The formula is short: water, ethyl tafluprostamide, eyebright (Euphrasia officinalis) extract, propylene glycol, salt, alcohol, phenoxyethanol, citric acid and triethanolamine. The ingredient that matters is ethyl tafluprostamide, an analogue of prostaglandin related to substances used in glaucoma eye drops. Prostaglandin analogues are the reason such serums can visibly lengthen lashes; the rest of the list is a simple carrier with a preservative (phenoxyethanol) and pH adjusters.

What to watch out for

For prostaglandin analogues, reported side effects include redness and irritation of the eyes and eyelids and darkening of the eyelid skin. The EU Scientific Committee on Consumer Safety (SCCS) has assessed prostaglandin analogues used in lash products – see the scientific opinions section on the ingredient pages. Triethanolamine is a restricted ingredient in the EU (Annex III). People who are pregnant, have eye conditions, wear contact lenses or use eye drops should consult an eye doctor first.

What users say

On Lyko (Netherlands) the 3 ml serum had an average of 3.7/5 from 235 reviews (checked 30 October 2026). Positive reviews describe clearly longer and fuller lashes, usually after two to three months of regular use, and some users keep the effect with occasional application. A noticeable group reports red, irritated eyes or irritated skin around the eyes; some saw no effect, and a few said lashes returned to their previous length after stopping.

Who it may suit

Adults who want a visible lash effect, accept the possibility of irritation and can apply the serum carefully to the lash line only. People with sensitive eyes may prefer a peptide-based serum without prostaglandin analogues.