What happens if I stop using the serum?
Like any beauty product, your results will last as long as you continue to use the product. If you stop using the lash or brow serum, things will return to their natural state in about a month, since that's the length of a growth cycle. The serum works on your existing lashes and brows, and since all hair grows in cycles, once the hairs shed naturally you'll see your results fade.
For hair, since the growth cycle is longer, you'll see your hair return to its natural state in a few months after discontinuing use.