I received a free lash boosting kit from L'Oreal. The package included one double extend mascara with serum on one end and mascara on the other. Very convenient. Also, a full sized package of Lash boosting serum.
Now this is a L'Oreal lash boosting 4-week challenge I'm participating in. I'm only one week in but I will say I love how the serum moisturizes my lashes before I put on the double extend Mascara. In my opinion, it has definitely prevented breakage.
AFTER ONE USE OF LASH BOOST SERUM
& DOUBLE EXTEND MASCARA