About Line Theory
When lashes change, care should change with them.
Line Theory creates considered lash and brow formulas for women whose natural definition no longer feels quite the same.
Our targeted serums are designed to help lashes and brows look fuller, healthier and beautifully present—through intelligent formulas, clear choices and one simple daily ritual.
Why We exist
For the changes beauty rarely talks about
At different points in life, lashes and brows can begin to look finer, sparser, shorter or more fragile. Mascara may no longer create the definition it once did. Brows may seem less visible. The change can be subtle; the way it makes you feel may not be.
Our Beginning
A personal experience became a precise brief
Line Theory began at Luma Science Labs after our founder noticed her own lashes and brows changing during menopause.
The products she found felt either temporary and cosmetic, or unclear about what they could genuinely offer. None seemed to have been made with women like her in mind.
She was not looking for an artificial new look. She wanted her own lashes and brows to feel visible, cared for and familiar again.
That became our brief: enough performance to matter, enough care to use consistently and enough clarity to make an informed choice.
Our Standard
What guides every formula
Purpose before novelty
Ingredients and formats are chosen for the role they play—not simply because they are on trend.
Clarity before hype
Straightforward language and transparent formula choices, particularly around prostaglandin analogues.
Consistency over complication
One precise daily step, designed to fit naturally into a considered routine.
Enhancement, not disguise
Care that supports the look of your natural lashes and brows, so the result still feels entirely like you.
More definition. More of you.
Well-defined lashes and brows can change the way the whole face feels: the eyes look more framed, the face more polished and your reflection a little more familiar.
We believe the most meaningful results do not make you look like somebody else. They help what is already yours feel beautifully present.
Not a different face. More of you.
Better lashes, beautifully.
The Line Theory Collection
Targeted care for lashes and brows, finished with effortless definition.
