Hormones also help tell your body what to do. Think for example when you go through puberty. That’s when you change from a boy to a man, testosterone tells your body it’s time to grow hair, want sex, get taller/more muscular. Hormones are also largely responsible for emotions and behaviors. A person will higher testosterone is more likely to display type a personality traits. Hormones are naturally excreted from glands such as the pituitary gland in the body, unless like all of us we supplement with lots of extra! In females hormones determine menstrual cycles, ovulation and female development. A good example of the effects of hormones is when a man decides to have a sex change, he suppresses his testosterone, raises his estrogen and literally starts to change into a woman. Also note I used the term “good example” loosely. Many hormones worth together in groups to self regulate their natural levels in the body. In men testosterone levels and estrogen levels should maintain a steady ratio, as testosterone rises so does estrogen. Progestin is secreted to keep estrogen levels in normal range and thus also impacts natural test levels. This is a very basic run down and by no means a complete working of how hormones work, but hopefully gives you some idea how hormones work in the body.