Would you like to know a little-known secret? Hormones are the leading cause of hair loss for both men and women either directly or indirectly. Hormones are made by the endocrine system and travel through the body to send a message to the target organ that elicits the desired response. Even though hormones are small molecules they make a big impact on how your body functions; right down to your hair. This is your guide to the role hormones in hair growth, why they cause hair loss, and what you can do about it!