I started when I was 60 and I am now 75. I sleep eight-nine hours, I have good emotional balance, great stamina and continue to live a full active life. After reading so much about what the loss of vital hormones can do to you mentally, physically and emotionally, I feel that taking this BHT has greatly enhanced my body and mind. To replace hormones with bioidentical hormones so that your body knows exactly what to do with them is a perfect match!