Female, 5'3", 48, Starting weight: 163lbs. Current weight: 135.
Starting bench press: 30lbs. Current bench press: 75lbs.
From what I understand the reason why soy phytoestrogens work to relieve those symptoms is because they bind to the receptors that real estrogen normally binds to. You're trading one that's natural for one that isn't... and isn't identical either, and is according to some studies is genuinely harmful.
On the other hand using progesterone cream made from wild yam, which is bio-identical to the progesterone you body already produces, has been shown to relieve the same symptoms by restoring a balance of progesterone to the natural estrogen in the body.
But then my research into these issues is still pretty new...
But, I WOULD NOT take soy, and I have avoided it for as long as it's been pimped as some sort of "perfect food" and has shown up in every processed product under the sun.
The exception to this is traditional fermented soy products such as miso and tamari that I use sparingly.
Our body is our subconscious mind, and anybody who thinks that their conscious mind is running the show is seriously mistaken. In fact the conscious mind just may be the most narcissistic entity in the universe, it thinks it's running the show. It's not.
~ Nora Gegaudas
"Everything can be taken from a man but one thing... -- to choose one's attitude in any given set of circumstances, to choose one's own way." ~Vicktor Frankl
And that's why I'm here eating HFLC Primal/Paleo.
Taking progesterone cream is a much simpler, reliable solution IMO.
F 5 ft 3. HW: 196 lbs. Primal SW (May 2011): 182 lbs (42% BF)... W June '12: 160 lbs (29% BF) (UK size 12, US size 8). GW: ~24% BF - have ditched the scales til I fit into a pair of UK size 10 bootcut jeans. Currently aligning towards 'The Perfect Health Diet' having swapped some fat for potatoes.