I've been taking milled Flaxseed now for 3 months and my severe hot flushes have stopped completely, not a single flush or sweat for 3 whole months!
I'm not sure if I care too much if it's a placebo effect or not, it's just so wonderful to feel human again.
If anyone else wants to try it, I'm taking Linwood's ready-milled Flaxseed which is available in Sainsbury's, Waitrose, possibly Holland & Barratt. It comes in a packet, like coffee, but in some supermarkets, they don't know where to put it so you may have to hunt it down. You'd think it would be by the cereals or possibly in the baking isle but don't be surprised if you find it shoved in a dark corner somewhere. You can also buy it online.
I think dosage does matter as I know some who only have a sprinkle on their morning cereal and that doesn't seen to be enough to stop the flushes. I take a big heaped tablespoon daily, which probably equals 45 grams approx.
It's slightly nutty in taste and is great on chopped fruit with yoghurt or milk. It does need to be milled or ground to get the benefit but Linwood's comes ready milled. A lot of flaxseed/linseed that is sold unbranded is NOT milled. Warning - it does soak up milk/liquid quickly.
Note it has an effect on your digestion which can be quite alarming! But this does settle down after a week. It is a good idea to make sure your liquid consumption is good, otherwise blockages can occur (felt obliged to warn about that but I'm a tea addict so not an issue for me).
The theory behind taking it is that it acts as an plant oestrogen. There seems to be less trouble with flushes and other menopause symptoms in countries that naturally eat plant oestrogens in their diet. In Japan apparently they don't even have a word for menopause and they consume a lot of soya (please correct me if I'm wrong on that). I found I just couldn't eat soya, not to any real extent (tried soya milk in tea anyone?! YUK!) so Flaxseed seemed worth a try. But I am touching a lot of wood that it's not just in my mind.
Here's a link with some general info on flaxseed: