I have used a lash serum from Rodan & Fields for years. I got TYS lash treat as a gift and I love it. I purchased two more tubes. The price is right. It’s not irritating (& I have sensitive skin). It takes a little while (about a week or more) before you see results but then your lashes are so long.
Best smell I’ve ever smelled! Repurposed the jar into a cute pen holder when it was done! 10/10!