Hi to Everyone, I'm from the UK, and just joined this mailing list. I wondered if anyone can help me with my problem. I'm 21 and as far as I know fit and healthy, I've been on the paleo diet for 7 months and lost 35lb (2.7st), but I've not had a period for 6 months. I'm 5ft 7" and now weigh 125lb (8.13st), I know oestrogen is stored in fat cell's, but I don't think I look or am underweight. Is this the diet doing this, or not? and will they ever come back? I've started to think it might be an early menopause because before the diet they had become very irregular and light over the past few years, and I used to get hot flushes sometimes and all the PMS symptoms which have gone now. Could it be thyroid related?, as we have a family history of over-active thyriod's and mine went like this once, but returned to normal as a virus caused it. On the other hand I've also been really worried and stressed out over the past year, so maybe it's not the diet. I'd be interested to know if this has happened to other women while on the diet too. I'm really confused and worried!, and would be really grateful for any advice. Cheers Mel.