clinical finding

Myristoyl Pentapeptide-17 — lash-density and keratin-gene studies

in the study

Manufacturer lash-density and keratin-gene studies of Myristoyl Pentapeptide-17

what it showed

Symrise reports increased lash density across a four-person study, a separately labeled 10% example image series, and induction of hair-specific keratin genes in a 48-hour cell assay.

You will find Myristoyl Pentapeptide-17 in LashExtend.

For a denser, fuller-looking lash goal, Myristoyl Pentapeptide-17 is the named peptide in LashExtend.

updated 2026-09-23 · clinical finding

Complete measurements and study notes

4 details

How it was evaluated: In vitro human keratinocyte gene-expression assay; uncontrolled four-person lash-root image study; and one separately labeled 10% example image series
Who took part: Human study: four people across 5% and 10% supplier-material conditions; the conclusion slide does not assign its result series to either strength. A separate 10% image sequence is labeled as one example.
Statistical context: Symrise reports increasing lash density through day 42 in its four-person study and provides one separately labeled 10% example image series.
Information checked: 2026-09-12

Measured results · 48 hours

Hair-specific keratin-gene expression

induction of hair-specific keratin genes

For Myristoyl Pentapeptide-17, Symrise reports induction of hair-specific keratin genes after 48 hours in an in vitro human keratinocyte assay using 0.001% neat material.

When it was measured: 48 hours

Measured results · day 14; day 28; day 42

Lash density

lash-density increases of 33.67%, 46.71%, and 60.60%

For Myristoyl Pentapeptide-17, Symrise’s conclusion slide reports increasing lash density through day 42, with values of 33.67% at day 14, 46.71% at day 28, and 60.60% at day 42 in a four-person uncontrolled lash-root study testing 5% and 10% supplier-material eyeliner serums once nightly; allocation between strengths and whether or how the conclusion series combines them are not disclosed.

When it was measured: day 14; day 28; day 42

Right-eyelash density

46.26%, 66.3%, and 72.29% increases in one image series

For Myristoyl Pentapeptide-17, Symrise labels a single right-eyelash image series for its 10% supplier-material eyeliner-serum example with increases of 46.26% at day 14, 66.3% at day 28, and 72.29% at day 42.

When it was measured: day 14; day 28; day 42

Measured results

Myristoyl Pentapeptide-17 — lash-density and keratin-gene studies

LashExtend contains Myristoyl Pentapeptide-17, a short peptide used for denser, fuller-looking lashes, beside White Tea and Chamomile extracts.