Isoflavones are found in small amounts in a number of legumes, grains, and vegetables, but soybeans are by far the most concentrated source of isoflavones in the human diet (104, 105) .
Standing water under a house is usually the result of only two things; either a leaking water line, or from surface water drainage around the house. If it was from a leaking water line, the leak would have to be substantial, and you would hear running water in the house.
The warmest water is near the surface and the coldest is at the bottom. However, certain situations can cause a lake to turn over placing the coldest layers on top. Such an event is extremely dangerous to the nearby inhabitants because it can cause suffocation.