Eckhart Tolle actually addresses this in The Power Of Now. When I first read it I thought it was so strange that he would talk about women's cycles but now I can see that it is something that should be addressed. As for diet I found that cutting out dairy and cutting back on meat made a big difference for me, but mostly just in reducing pain. I do think that no amount of diet chance and supplements can change the fact that it's a challenging time. Every time you are sick, don't get enough sleep etc, it's going to be much harder to stay present. Hormones do affect the way your brain works. It's a challenge but challenges make you stronger. At the moment I'm 9 months pregnant and sick with a cold so it's super challenging to stay present and not identify with the ego or my current situation. I find that accepting it and being aware of the fact that I need to spend extra effort taking care of myself and watching my emotions and reactions, and realizing that's all they are... BEFORE they result in unconscious behavior is all I can do.