Intensive Lash Growth Serum

When your lash line feels less like yours.

Over time, lashes can lose some of the length, density and contrast that once helped frame the eyes. Mascara has less to catch, the lash line looks softer and the whole eye area can feel less defined.

Intensive Lash Growth Serum was created for that specific concern. Rather than producing a temporary coated effect, it supports the appearance of a fuller, more noticeable natural lash line through consistent nightly use.

Whether your lashes have gradually become finer or feel less substantial after extensions and everyday styling, the aim is the same: lashes that look longer, feel better conditioned and bring definition back to the eyes.

Start with clean, dry skin. Apply once nightly after removing makeup, use the wand to apply a thin layer of serum along the upper lash line, as you would with eyeliner. Blink several times to help the serum transfer naturally to the lower lashes. Avoid getting the serum directly in your eyes.

One dip is enough for both eyes. Do not apply directly to the lower lash line. Using more will not improve results and may increase sensitivity.

Important Safety Information

● Avoid contact with the eyes.

● Do not use if you are pregnant, breastfeeding, or under 18 years of age.  Consult your doctor before use if you have any pre-existing medical conditions.

● Discontinue use if redness, irritation, or discomfort occurs

Yes. Powered by a prostaglandin analogue, this formula is designed to enhance the appearance of longer, darker-looking lashes. Clinical research on a prostaglandin analogue has shown significant improvements in eyelash length and darkening versus placebo over 3 months.¹

Our Intensive formula uses a prostaglandin analogue for customers who want a high-performance lash serum. For customers who prefer to avoid prostaglandin analogues, our Precision Lash Serum is prostaglandin-free.

Weeks 1–2: Softer, Fuller-Looking Lashes

Your lashes may start to feel softer, more conditioned, and appear slightly fuller as the serum helps nourish and support lash health.

Weeks 3–4: A Visible Increase in Length

With continued use, your lashes may begin to look longer and more defined, giving your natural lash line a more enhanced appearance.

Weeks 4–6: Longer, Smoother-Looking Lashes

By this stage, lashes may appear smoother, more polished, and noticeably longer-looking, especially when used consistently as part of your routine.

Weeks 6–8: Fuller, Longer-Looking Lashes

This is when many users begin to see the fuller, longer-looking lashes they’ve been dreaming of. Your natural lashes may appear more dramatic, healthy, and beautifully enhanced.

*Consumer perception study of the finished Line Theory Intensive formula, with 100 participants, used once nightly for 12 weeks. 99% of participants agreed that their lashes looked improved in thickness, fullness or length.

For best results, apply the lash serum consistently as directed, evening is best. Daily use is key to achieving and maintaining visible results.

Important: Individual results may vary. Consistency is essential for best results.

To maintain your fuller, longer-looking lash appearance, continued use is recommended. Once you stop, your lashes will gradually return to their natural cycle over time.

Yes, this product is eligible for our 3-Month Moneyback Guarantee. Learn more here.

Take your dated “before” photograph within 14 days of delivery and use the serum as directed for 12 weeks. First purchase only. Full terms apply.

Aqua, Butylene Glycol, Hydroxyethylcellulose, Keratin, Hydrolyzed Keratin, Biotin, Sodium Hyaluronate, Isopropyl Cloprostenate, Myristoyl Pentapeptide-17, Octapeptide-2, Allantoin, Panthenol, Pantethine, Polypeptide-23, Pumpkin Seed Extract, Glycerin, Malus Domestica Fruit Cell Culture Extract, Hydrolyzed Glycosaminoglycans, Sweet Almond Fruit Extract, Backhousia Citriodora Leaf Oil, Dipotassium Glycyrrhizate, Rhizobian Gum, Xanthan Gum, PEG-12 Dimethicone, Alcohol Denat., Chlorphenesin, Phenoxyethanol, Sorbic Acid, Sodium Benzoate.