Monthly menstrual cycles provide hormones a woman’s body needs regularly to stay healthy and keep her immune system strong. But what happens when that process is interrupted? Scientist, author and naturopathic doctor, Lara Briden believes hormonal birth control can have tremendous effects on the body's longterm health and ability regularly to produce hormones like estrogen and progesterone. Halting the body's natural monthly menstrual cycle with hormones is akin to castration, Lara believes. In this LLAMA podcast interview with Peter Bowes, Lara, author of Period Repair Manual, describes what happens to a woman's body when she is taking hormonal birth control pills, and what this could mean for immune and brain health later in life. She also discusses birth control alternatives, and what she does to keep her body's sleep cycle on track and lead a healthy life.