Normalizing estrogen levels means that if you have too much estrogen or too little estrogen, soy will help normalize it (by opening or closing estrogen receptors). Skipping your periods (if you are not perimenopausal) is an indication that you may be low on estrogen, possibly from a strenuous exercise routine that depleted your body of fat (necessary for estrogen production). You may also suffer from hot flashes, night sweats, fuzzy thinking, mood swings,dry skin and other irritating conditions. Some researchers say those are caused by estrogen dominance, others say those are caused by low estrogen. Measuring estrogen and progesterone is imprecise at best because your levels can fluctuate several times in a day.

It was thought that soy helped with hot flashes because Oriental women do not have a word in their vocabulary for hot flash and they consume a lot of soy. Obviously, there are probably other factors, but soy has been shown to be of benefit in some studies. Other studies show no benefit. A lot depends on who is being studied, what type of soy they've used, yada yada yada.

So, it can't hurt, might help. Everything in moderation, though.