Dangers of Soy?

I loved milk (around one glass a day of skimmed, or with bran flakes) before the low carb regime  and I've really missed having milk, I do however love Alpro unsweetened Soy milk, which is quite  low in carbs, but a friend of mine went on a rant today about the dangers of Soy.

Does anyone know anything about the "dangers of soy" particularly in relation to hyperthyroidism? Everything I've googled is really propagandary and I'd just like a couple of opinions on it.

I'm not terribly bothered about "x gives you cancer" food fadism, but I am interested in this particular product as I'm introducing something that I've had relatively little contact with in the past.
I enjoy tofu and do cook with it occasionally but since low carbing I've increased my intake of soy quite largely, using it as a meat sub for currys etc, cold marinated in salads, in dips and to make chocolate mousse when having people over for dinner, as well as the soy milk, so any one with any knowledge of Soy and it's healthfulness would be really appreciated.

You should talk to whomever treats your thyroid problem.  One of the reasons why some people avoid soy, in fact are told to avoid it by their GPs, is because it's a potent source of phytoestrogens.  I don't know much about thyroid issues, but women in my family have been advised by doctors to avoid soy and other products because of the type of breast cancer that runs in our family. 

Soy use in the general population is a slightly different subject, but keep in mind, Western society seems to latch on things and over do them.  Things like tempeh and miso are totally different than blocks of tofu.

Legs is spot on.

I have switched from soy milk to Rice Dream . Have you tried it?