Testosterone being a a primary sex steroid will grow hair on the eyebrows. It is a powerful biological molecule that will grow hair all over the body, male or female.
Testoterone will make you grow more hair everywhere. That is why men have so much hair all over their bodies and it will be very wiry and long and when shaved it is a night mare and grows back very quickly.
It may. Testosterone is the male sex hormone, and will also have many unwanted side effects such as being easily aroused, an enlarged jaw, and unwanted body hair.
