The active ingredient? Bimatoprost, a prostaglandin analog that extends the growth phase of your lashes, making them grow longer, fuller, and darker over time. Latisse also contains:

Benzalkonium chloride (a preservative)
Sodium chloride (aka salt)
Citric acid (helps balance pH)
Purified water (keeps it stable and effective)

How Long Until It Starts Working?

Lash growth isn’t instant, but with patience, the results are worth it! Here’s what to expect:
Weeks 4-8: You’ll start noticing longer lashes.
Weeks 8-12: More fullness and darkness.
Week 16: Maximum lash length, thickness, and color!

For best results, apply it every night before bed and don’t skip days—lashes grow in cycles, so consistency is key.

Latisse is safe and well-tolerated, but here’s what you should know:

Mild itching or redness (common in the first few weeks)
Darkening of the lash line (can happen but often fades if you stop using it)
Eye dryness or irritation (rare but possible—avoid touching your eyes after application)

To avoid irritation, only apply it to the upper lash line, and don’t overuse it—a little goes a long way! If any side effects persist, check in with your doctor.