81% confirm longer eyelashes: Results of a 12-week study
How effective can a hormone-free eyelash serum be? A dermatologically supervised study of the 8T3 Essentials Lash & Brow Serum provides well-founded answers to this question.
Longer, fuller eyelashes are a common desire for many, often accompanied by uncertainty. Eyelash serums in particular raise questions about effectiveness, ingredients, and tolerability. Many users are especially skeptical of hormone-containing formulations. Rightly so, as confirmed by the Scientific Committee on Consumer Safety of the European Union (SCCS). Against this background, the effectiveness of the hormone-free 8T3 Essentials Lash & Brow Serum was examined in a 12-week usage study under dermatological supervision. The aim was to capture visible changes both from the users’ perspective and based on objective measurement data.
Study Design and Procedure
Over a period of twelve weeks, 21 participants aged 20 to 65 applied the 8T3 Lash & Brow Serum once daily in the evening. The development of their eyelashes was documented at several time points: at the beginning and after 4, 8, and 12 weeks. The study combined two perspectives: the participants’ personal assessment and a computer-assisted image analysis (Canfield).
How the Canfield Image Analysis Works
With Canfield technology, high-resolution close-up images of the eyelashes are taken under analogues conditions, meaning identical lighting, perspective, and magnification. The subsequent software-assisted analysis makes it possible to precisely and objectively detect even subtle changes in length, density, and intensity.
Key Results:
- After twelve weeks, a clear picture emerged: 81% of participants confirmed visibly longer eyelashes.
- As early as after four weeks, 67% reported initial positive changes. This indicates that development begins early and intensifies over time.
- The detailed analysis documented individual peak values of up to +39% increase in length. In addition, improvements in intensity and visible lash area were observed.
- The application also proved convincing in everyday use: 95% of participants described integrating it into their daily routine as uncomplicated.
How Do the Results Develop Over Time?
The data show a differentiated picture: while perceived length increases within the first few weeks, changes in structure, density, and strength primarily develop later on. The most noticeable effects were observed in the final third of the study. A typical pattern for growth-based processes such as the natural eyelash cycle.
Safety in Focus
A central aspect of the study was application safety. The hormone-free Lash & Brow Serum from 8T3 Essentials deliberately avoids prostaglandin analogues – unlike many conventional eyelash serums.
Throughout the entire study period, the application was dermatologically monitored. The 8T3 Essentials Lash & Brow Serum received the “excellent tolerability” seal from the renowned DermaTest Institute and was also tested as microbiome-friendly.
Good to Know
As with any usage study, the results show clear trends but cannot be universally applied to every individual. Personal factors such as the initial condition, the eyelash growth cycle, and consistency of application always play a role. The documented peak values reflect the potential, not the average.
Effectiveness Without Compromising Tolerability
The available data show that with consistent use of the 8T3 Essentials Lash & Brow Serum over twelve weeks, visible improvements in the appearance of the eyelashes are possible—without any hormone-based active ingredients. At the same time, the study makes it clear that effectiveness and tolerability are not mutually exclusive.
Detailed insights into the methodology, before-and-after documentation, as well as the full analysis can be found on the study page:
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