The use of bio-identical hormones - including progesterone, estrogen, testosterone, melatonin, thyroid and adrenal hormones - is an important way to restore health. This is very important in our era of widespread pollution by endocrine-disrupting chemicals that have made hormone imbalances so common. This is an unrecognized contributor to insomnia, chronic fatigue and fibromyalgia, depression and anxiety, and many other poorly understood health problems whose prevalence is rising every day.