I have been using bio-identical hormones for the past 10 years. I initially looked into using them because I was having sleep issues. Not only do they help with sleep but also have a positive effect on my mood, energy level, and weight issues. I think it's important to get just the right dose of each hormone since everyone"s body is so different. I've also read that they decrease my chances of getting breast cancer and having cardiac issues, which have affected some of my family members.