Is it ok to use the M2 Eyelash Activating Serum in combination with lash extensions?
Yes, you can use both the Eyelash Activating Serum and lash extensions at the same time.
https://www.m2beaute.com/en/eye-care-faqs/m2-beaute-eyelash-activating-serum/is-it-ok-to-use-the-m2-eyelash-activating-serum-in-combination-with-lash-extensions