After years of reviewing lash products for this site, I've become genuinely hard to impress. Most serums fall into one of two camps: the ones with prostaglandins, which work but come with a real risk of irritation, and the ones without any active growth ingredient at all, which just leave a temporary glossy coating that washes off the next morning.
I went into testing Skale Lash expecting one of those two outcomes. By the end of the first bottle, neither was true. No irritation, not even mild. And by week four, my own lashes had a visible, undeniable change in length along the center of the lash line, the area that thins first on most people.
It isn't instant. If you're looking for a result overnight, this isn't that product, and the brand doesn't pretend otherwise. But for a slow, cumulative, low-risk way to get your own lashes back rather than borrowing someone else's, it's the most consistent formula I've tested in this category.