You are not doomed to losing your mind just because you are getting old. Modern research is providing things you can do to avoid dementia and Alzheimer's disease. In this book you will learn that a hormone (melatonin) your body makes helps to protect your brain. You will learn that just using ordinary light at night is robbing your brain of this beneficial substance. You will learn how it was discovered it is the blue rays in ordinary light that suppress melatonin and how light bulbs were developed that don't make blue light. You can also protect yourself with special orange glasses that block blue light