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.
Pipes, particularly plastic pipes that nestle under slab foundations suffer stress due to the expansion and contraction of the soil. The result can be cracks in the pipe and water leaks under the slab. Improper drainage of water away from the house can contribute to water under the slab foundation as well. Lack of gutters or disconnected downspouts allow excessive water to dump onto the soil nearest the foundation during heavy rains. Without proper drainage, the soil becomes over-saturated.