1. Castor Oil:
Castor oil is a very old and a tried and tested remedy to get thicker and prominent eyebrows. It is inexpensive and is easily available in the market. It contains protein, vitamins, fatty acids and antioxidants that nourishes the hair follicles and promote hair growth.
All you need to do is take a little castor oil on your fingertips and apply directly on to your eyebrows. Leave this overnight and wash off in the morning. You can witness possible changes in about 3-4 weeks of time.
Note: Stop using castor oil if it causes any irritation or burning.