I have been paleo for almost a year now and love it! I, too, have always had oily skin and that hasn't changed, but the tone and texture and look of my skin has - for the better! As far as mensturation, from the little I have read on this, eating paleo can and should start to regulate your hormones which can cause changes. Sorry if this is tmi, but for me I have been on the pill for years and my period has always started on Wed.. It now starts on Tues so there may be something too the whole regulating hormone thing - I don't know! Its just a change I've noticed in myself. Also, I have much easier periods when I am sticking closer to paleo. At times when I go rogue and start eating bad I have noticed that I have much more cramping and irritability. What kind of changes have you been experiencing? For better or worse?