Lash Serums 101
Written by Jamie Becker, Sweet Tox Nurse Injector
Lash serums are everywhere right now, and it’s easy to see why! Who doesn’t want longer, fuller lashes without the hassle of extensions? But before you swipe that serum across your lash line, it’s worth taking a closer look at how they work, what’s inside them, and what you should expect – the good and bad.
Side note- I was actually inspired to write this blog post after noticing patients coming in with redness and irritation around their eyes, and what so many people don’t realize, is that their lash serum is often the hidden culprit causing this redness and irritation.
So, what even IS a lash serum?
Lash serums are like a multivitamin for your lashes. Some help condition and strengthen, while others are specifically for actual lash growth.
Here’s the quick breakdown:
Conditioning Serums – Often contain peptides, biotin, and natural oils to strengthen and hydrate lashes.
Growth Serums – Typically contain prostaglandin analogs, which can extend the lash growth cycle for longer, thicker lashes!
When will you see results?
Lashes don’t grow overnight (we wish!). Most people see changes in 4 to 8 weeks, with the best results showing up around 12 weeks. Stick with it – consistency is key!
What are common side effects to watch out for?
While lots of people have amazing results, some serums (especially the growth kind) can cause side effects. Keep an eye out for:
Redness or irritation around the eyes
Dry eyes
Skin darkening on the eyelid
Changes in eye color (rare, but real!)
A hollowed-out look around the eyes (caused by fat loss under the skin)
If something doesn’t feel right, stop using it and check in with your doctor or provider.
How to use:
Apply to clean, dry skin – just the upper lash line
Less is more – a little goes a long way!
Avoid actual eye as much as possible
Store it somewhere cool and dry
Why We Love the lash serum sweet tox carries- RevitaLash Advanced Pro
Here at Sweet Tox, we’re very picky about what we carry – and RevitaLash Advanced Pro has absolutely earned its spot on our shelves. It’s the gold standard of lash serums, and here's why we’re obsessed:
Doctor-Created With a Purpose: An ophthalmologist created this formula to help his wife regrow lashes after chemotherapy. It’s a serum born out of love and science.
Powerful, Yet Gentle: The formula is packed with peptides, lipids, and plant-based extracts; all designed to fortify and condition lashes without irritation.
No Redness, No Drama: RevitaLash Advanced Pro is non-irritating and suitable for contact lens wearers and those with sensitive eyes!
Clinically Proven Results: Visible improvements usually start around 4–6 weeks, with full results in 3 months. Lashes look longer, fuller, and healthier.
Pro-Only Formula: RevitaLash Advanced Pro is a professional-exclusive version that’s only available through licensed providers (like us!). It’s stronger, more effective, and has bonus ingredients you won’t find in the over-the-counter version.
Want to learn more or grab a tube? Click here!
The Bottom Line
Not all lash serums are created equal. Some might be perfect for you right away, while others could cause irritation or unwanted side effects. If you’re seeing any changes around your eyes – it might be time to rethink your serum.
If you're nervous about prostaglandin-based serums, don’t worry! There are gentler, prostaglandin-free options out there. They might take a little longer to work, but could be your perfect match.