subject: How to Grow Thicker, Longer Lashes with Peptides [print this page] If you are looking for a way to get thicker, sexier eyelashes, you now have a number of options. The good news is that you no longer have to rely solely on surgeries and prescription products to get the look you want. With many peptide-based products available, you can find a lash enrichment product that will condition current lashes while adding to the lash line with a thicker row of long, sexy eyelashes.