**** Why not caffeine but sleep?? **** Lately I have noticed that I get some tenderness back whenever I don't have enough sleep. And then I ran into these news articles. They talk about the possible correlation between caffeine intake and estrogen production, and also about lack of sleep (lack of melatonin) and estrogen production. ** Caffeine and estrogen http://dailynews.yahoo.com/h/nm/20011123/hl/coffee_3.html ** Sleep and estrogen http://more.abcnews.go.com/sections/living/dailynews/breastcancer011016.html (12-6-01) Pep's home page is at http://www.geocities.com/pepchun/p.html thanks!