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.
Yet another possible cause of low water pressure is a leak in the main. Check your basement or garage for visual evidence of a leak, or head outdoors to inspect the ground where your main meets the local supply. Assuming the weather has been dry, a wet spot here suggests the need for professional assistance.