I am a very young and active 65 year old.. I cannot do chemical or Bio HRT's. I have tried all of the 'natural' remedies with no relief. I experience frequent hot flashes and am awakened from night sweats 3-4 times each night. I am very healthy and require no medications except a baby aspirin. I want to try melatonin but worry about how long I can take it and if it is habit forming.