biotin You might have heard of biotin-it's basically the go-to supplement for healthy hair, skin, and nails. And it can help you with growing out your eyebrows, too. ... It's specifically designed for eyelash growth, but both Downie and Evans say it can be successfully used off-label to grow thicker, darker brow hairs.

jamaican caster oil There are two main types of castor oil to choose from for eyebrow application: clear or cold-pressed castor oil and Jamaican black castor oil, which is pressed from roasted castor seeds. Both types contain the same properties that may help hair grow thicker. It's important to choose a product that is pure castor oil.

coconut oil From moisturizing and protecting your skin and hair to having antimicrobial and antifungal properties, the many benefits of coconut oil may extend to your eyelashes, too. Coconut oil may help keep your eyelashes healthy, resulting in fuller lashes that can stand up to cosmetics and eyelash styling tools.

aloe vera Yes, you can use aloe vera to help grow your eyelashes. Since it heals and nurtures the skin around your eyes, so that your eyelashes will grow longer. What's more, aloe vera can treat oily skin, which is the cause of unhealthy hair.

vitamin e “Vitamin E acts as a conditioner to help your lashes grow strong and healthy,” wrote Kardashian. ... In fact, many of the best eyelash growth serums on the market use natural vitamins like this to condition and nourish lashes while working to prevent breakage