I'm been using this Cils Booster Lash Revitalizing Serum for about 4 weeks and have not seen a change. I'll keep using it and hope it takes a little longer to help my lashes thicken.

i’ve used other formulas that worked faster and better

I started using the product but I must say I was not consistent. During the time when I used to product I could see and improvement.

I love this product as it protects my eyelashes and fortifies them and helps them grow.

OMG! This product is phenomenal! I had an allergic reaction to the glue to lash extensions, so my lashes were broken, brittle and sad. I damaged my long natural lashes for what I thought was full glamorous lashes. I was so disappointed, then I found the CILS Booster Lash Serum. In 2 weeks I saw new fresh growth, in one month I had some lashes to put mascara on-now 3 months later, my natural lashes (both top and bottom) are beautiful, naturally long. I use this morning and evening. When I wear mascara, I use the Lancome Cils Lash booster and any of the fine Lancome Mascaras offered. No need for extensions EVER!

[This review was collected as part of a promotion.] I've been using for ~ 1 month before writing this review. I didn't see any result clearly, though I feel like it helps thicken lashes a bit. Will use for longer to see if it has any more effects.

I see a difference in my lashes after two weeks of use. My only complaint is that my lashes can get a little stiff and clumpy. Let's see what a few more weeks of use can do.

I have been using this product for a week and I am seeing progress.