
Our mission
Line Theory was created for lashes and brows that no longer feel quite like yours: finer, shorter, sparser or more fragile than they used to be. At the heart of our formulas is PACT-17®, our peptide-led conditioning complex designed to help lashes and brows look fuller, feel softer and appear healthier over time. Choose Intensive when you want a more targeted performance formula with a prostaglandin analogue. Choose Precision when you prefer a prostaglandin-free, comfort-led routine. Every formula is designed around the same philosophy: visible definition, daily consistency and care that respects the delicate eye area.
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