THE FORMULATION
Formulation with purpose
At the heart of every Line Theory serum is PACT-17®, our proprietary peptide-led conditioning complex.
PACT-17® brings together targeted peptides and conditioning ingredients selected to care for lashes and brows that look fine, fragile or depleted. With consistent use, our formulas help support a fuller-looking, smoother and healthier appearance while leaving lashes and brows feeling soft and well conditioned.
Our prostaglandin-based serums are designed to support the appearance of longer, fuller and more defined lashes and brows. With consistent use, they can help enhance your natural hairs for noticeable, beautifully defined results.
We also offer prostaglandin-free serums for those who prefer a gentler option, particularly if you have sensitive skin or eyes. These formulas nourish and condition the lashes and brows while supporting a healthy, fuller-looking appearance.
Every ingredient has a role. Every texture is made to feel elegant in use. Every applicator is designed for precision.
Because consistency matters—and a well-designed ritual is easier to keep.
THE TARGETED PERFORMANCE APPROACH
Intensive
The Intensive formulas are designed for customers looking for our more targeted performance approach.
Intensive Lash Growth Serum supports the appearance of longer, fuller-looking lashes, while Intensive Brow Growth Serum provides focused care for brows that look sparse, uneven or less defined.
Both combine PACT-17® with a prostaglandin analogue and are designed for one precise application each evening.
THE PROSTAGLANDIN-FREE APPROACH
Precision
PACT-17® + prostaglandin-free
The Precision formulas are created for customers who prefer to avoid prostaglandin analogues while continuing to support the appearance of fuller, healthier and more defined lashes or brows.
They combine PACT-17® with conditioning ingredients in a straightforward daily formula, offering a clearly differentiated prostaglandin-free choice across both lash and brow care.
The Line Theory Collection
Targeted care for lashes and brows, finished with effortless definition.
