For professionals
How Lash Filler® 25.9 was made: vegan, tested, 25% thicker
Improving a treatment that already worked was a risk. InLei® began reworking its Lash Filler® line between 2019 and 2020, aiming for greener, non-animal ingredients, faster and cleaner treatments, and fewer allergic reactions, without losing curl or thickening. The project took three times longer than the original line.

What changed
- Plant-based keratin. Lash Filler® 3 moved from animal-derived to vegetable keratin.
- A washing step. Cleansing with Magica Mousse during the treatment makes it cleaner and faster.
- A fourth product. Lash Molecular 4 rebuilds the lash at a molecular level and closes the treatment.
- Steps 1 and 2 unchanged. Lash Form 1 and Lash Fix 2 were already stable and vegan.
Clinical testing in Milan
From October to December 2022, a clinical laboratory in Milan ran three test sessions with:
- 40 models of different ethnicities (double the earlier tests), 120 treatments in total;
- measurement of both lash thickness and length;
- comparison with and without daily InLei® Adiutrix serum.

The results
Following the official protocol, after a cycle of three treatments:
| Lash Filler® 25.9 | With daily Adiutrix serum for three months | |
|---|---|---|
| Thickening | 25% | 28% |
| Lengthening | 9% | 12% |
That is where the name comes from: 25 and 9.

Certified vegan, sustainably packed
InLei® chose VEGAN OK, an ethical certifier with over 20 years of history, to certify the range. Much of the packaging carries FSC certification for responsible forestry.

Using Lash Filler® 25.9 in South Africa
- Buy the Lash Filler® 25.9 kit or the sachet kit.
- Learn it on the two-day Lash Filler® course, or the online conversion course if you are already certified.
- Compare it with other lifts in lash lift vs lash lamination vs Lash Filler®.
Frequently asked questions
What does 25.9 stand for?
The test results: an average of 25% thicker and 9% longer lashes after a cycle of three treatments following the official protocol.
How was Lash Filler® 25.9 tested?
At a clinical laboratory in Milan from October to December 2022, on 40 models of different ethnicities, for 120 treatments in total, measuring lash thickness and length.
What changed from the original Lash Filler®?
Lash Filler® 3 moved to plant-based keratin, a washing step with Magica Mousse was added, and a fourth product, Lash Molecular 4, now finishes the treatment. Lash Form 1 and Lash Fix 2 were already vegan and stayed the same.