Kosas GrowPotion Fluffy Brow + Lash Boosting Serum ($48 with Free Shipping) is a new 2-in-1 brow and lash boosting serum that was recently launched into the brand’s permanent collection. This serum is prostaglandin-free.
Prostaglandin is a popular ingredient in many lash growth serums like Latisse but it’s also an irritant. It also happens to cause the iris darkening! Many users say that after using lash serums that contain this ingreident they experience dryness and felt like their eyes were more prone to irritation. Where as others have no such issues and experience great results.
For some reason, I’ve always been personally scared of the whole your iris will darken thing. I dunno why but that squeaked me out and prevented me from every trying any lash growing serums. I have explored other options though and recent indulged in the Ordinary Multi-Peptide Lash and Brow Serum! I’ve always had very full lashes but in my older age I realized my constant eye curler usage as really done a number on them which made look around for lash serums that didn’t contain prostaglandin. And more and more are releasing!

I currently have the Kosas GrowPotion Fluffy Brow + Lash Boosting Serum in my cart and I think I’m ready to hit submit on it. Kosas hasn’t failed me yet. This formula is great for sensitive eyes and can be used both on sparse brows and lashes. As per their clinical studies it worked within 12 weeks.
It contains pept...