I was wondering if it's safe to use caster oil on my eyelashes?

Although I don't think it will hurt, I've also never heard of caster oil helping. There are any number of things that could be causing your hair loss. You might want to schedule an appointment with a dermatologist to discuss. Latisse can help your existing lashes look longer and fuller, but it will not encourage them to grow. Hope this helps, Dr. Nazarian

To date, castor oil has no scientific proof for being beneficial for eyelash growth.There are a fee dozen reasons for eyelash loss. If you are worried, be sure to see a dermatologist who specializes in hair problems.