Apply eyelash growth serum once a day, at night, along the upper lash line only. Use one dip of the applicator, draw a thin line from the inner corner to the outer corner, then let it dry for a few minutes. Stay consistent for eight to sixteen weeks. That is the whole method.
Start With a Clean Lash Line Every Time
Clean lashes absorb more active ingredient, so always begin with a bare, dry lash line. Makeup residue, mascara flakes and natural oils sit between the serum and your follicles. They block the very thing you are paying for.
Wash your face, then wait until the skin around your eyes feels completely dry. Wear contacts? Take them out first. You can put them back in about fifteen minutes after you apply.
Why You Only Treat the Upper Lash Line
Treat the upper lash line only, because blinking carries the formula down to your lower lashes on its own. There is no reason to coat the bottom row, and doing so just pushes product closer to your eye.
Most prostaglandin-based serums are designed this way on purpose. The active reaches the lower follicles through normal blinking within minutes. Apply to both lines and you double your irritation risk for zero extra benefit. Classic mistake, and one we see constantly.
The One Dip Rule That Saves Your Serum
One dip of the applicator holds enough serum for both eyes, so resist the urge to reload. More product does not grow lashes faster. It drips, it stings, and your bottle runs dry weeks early.
Wipe the excess against the neck of the bottle before you start. The line you draw should look damp, not flooded. In our experience, the people who burn through a bottle in three weeks are almost always double dipping.
How to Draw the Line Along Your Lashes
Draw a single thin stroke along the base of your upper lashes, moving from the inner corner outward. Keep the tip on the skin right where the lashes meet the lid, the same spot where you would place a fine eyeliner.
One smooth motion does it. You are aiming for the roots, not the length of the hairs, because the follicle is where growth actually starts. Let it dry fully before anything else touches the area.
Apply at Night So Bimat Works While You Sleep
Apply your serum at night, after cleansing, when your body does most of its repair work. An evening routine gives the Bimat prostaglandin analogue uninterrupted hours to absorb, with no makeup, sweat or rubbing in the way.
There is a practical bonus too. At night you are not layering foundation or sunscreen over the area within minutes. Give the serum five to ten minutes to dry, then go to bed. Simple.
Why Consistency Beats Quantity Every Time
Daily application matters far more than how much you use, so the real skill is simply showing up each night. Skipping even two or three nights a week can add weeks to your timeline.
Here is the thing about lash serums. They run on a cycle, not a clock. A typical picture: someone applies faithfully for ten days, gets busy, forgets for a week, then decides the product failed. Their lashes only stalled, and they quit right before the good part.
The Lash Growth Cycle in Plain English
Your lashes grow in three repeating phases, which is exactly why timing your serum matters. They do not grow nonstop like the hair on your head. Each eyelash moves through growth, transition and rest, then sheds and starts over.
Knowing the three phases shows why patience pays off here:
- Anagen, the growth phase, lasts roughly 30 to 45 days, when lashes actively lengthen.
- Catagen, the transition phase, runs about 2 to 3 weeks, when growth pauses.
- Telogen, the rest phase, can last 30 to 90 days before the lash falls out and a new one begins.
A serum only acts on lashes in or entering the growth phase. At any moment, just a share of your lashes qualify, so visible change builds gradually as more follicles cycle into anagen.
What Your First 16 Weeks Actually Look Like
Expect early signs around two weeks and full results somewhere between weeks eight and sixteen. Growth is steady, not sudden, and the small changes stack quietly before they become obvious.
This is the honest week-by-week picture most people see:
| Timeframe | What you notice |
|---|---|
| Weeks 1 to 2 | Lashes feel softer, early conditioning, first hint of darker color |
| Weeks 4 to 8 | Visible length appears, lashes look fuller and darker as hairs strengthen |
| Weeks 8 to 16 | Full transformation, lashes reach their maximum length and density |
Bimat’s clinical data points to lashes up to 106% thicker, 25% longer and 26% darker over a complete course. Those numbers land at the finish line, not on day three. No overnight magic, and anyone promising it is selling you something.
Five Mistakes That Quietly Wreck Results
Most disappointing results trace back to a handful of avoidable mistakes, not a faulty product. Fix these and you remove nearly every reason a serum underperforms.
Run through this short checklist before you blame the bottle:
- Applying over makeup or damp skin, which blocks absorption.
- Loading the applicator with far too much product.
- Coating the lower lash line and inviting irritation.
- Quitting at week four, before the growth cycle catches up.
- Switching products every month and never giving one a fair run.
Almost all of these come down to impatience or a heavy hand. Go light. Go slow. Go daily.
Going to Maintenance Once You Hit Your Goal
Once you reach the length you want, drop to roughly three applications a week to hold it. Lashes keep cycling and shedding, so a lighter maintenance dose supports new growth without nightly effort.
Stop completely and your lashes will slowly return to their natural baseline as treated hairs shed. That is not a flaw, it is just biology doing its thing. A few nights a week keeps you exactly where you worked to get.
Safe for Contacts, Extensions and Tender Eyes
The formula is safe for contact lens wearers, lash extensions and sensitive eyes, so most people can use it without reshuffling their routine. It is also vegan and cruelty free, with a single proven active rather than a long filler list.
Bimat is dermatologist and ophthalmologist approved, which carries real weight when you are putting anything this close to your eye. Remove lenses before you apply, then reinsert them once the serum dries. With extensions, a clean lash line actually helps your retention too.
FAQ
Can I apply lash serum in the morning instead of at night?
You can, but nighttime gives better results for most people. Overnight, the serum absorbs without makeup, sunscreen or rubbing interrupting it, and it lines up with your body’s natural repair hours. If mornings genuinely suit your routine better, daily consistency still beats a perfectly timed dose you keep skipping.
What should I do if serum gets into my eye?
Rinse with cool water and the mild stinging usually passes quickly. A small amount of transfer is common and rarely a problem, but you reduce the risk by using one thin line on the upper lash line only and wiping off excess first. If irritation lingers, pause use and check with your eye doctor.
Can I use the same serum on my eyebrows?
Often yes, since brows follow a similar hair growth cycle and respond to the same active. Apply a thin line to clean brows at night, and expect the same patient timeline of several weeks. Keep the product out of your eyes and stop if you notice any irritation on the brow skin.
How soon will I really see a difference?
Most people notice early softening and slightly darker lashes around two weeks, with clear length arriving between weeks four and eight. Full results build over eight to sixteen weeks because your lashes grow on a cycle. The biggest predictor of fast progress is applying every single night without gaps.