Coconut oil does not help your eyelashes grow longer. While it can keep them healthy, it won't increase the rate at which they grow. Coconut oil may help your eyelashes grow to their full length and thickness, preventing them from falling out as frequently. This is because coconut oil fights bacteria that can cause hair loss.
However, it's important to note that there is no scientific evidence to support the claim that coconut oil can make your eyelashes grow longer. If you're looking for ways to make your eyelashes longer, you may want to consider using a lash growth serum.