Harmony in hormonses is a book that describes the process of hormone replacement therapy in women who are in the perimenopause or menopause phase of life. This book highlights the benefits of hormone replacement therapy and why estrogen, progesterone, and testosterone are so beneficial to the female body.

Derek Lambert is a board certified nurse practitioner. He has been an expert in hormone replacement therapy since 2015 and he is a member of the American Academy of Anti Aging. Derek states his passion for helping women with hormone replacement therapy stems from helping preserve brain health in women.