The health effects of soy are much discussed. Soya beans contain so-called isoflavonoids that belong to the group of phytoestrogens. These phytoestrogens may interact with hormone metabolism, affecting thyroid metabolism. (See https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3074428/ ) In Asia – where soy is an important part of the diet – the legume is often not eaten “pure” but in fermented form. Typical soy ferments are Natto, Tempeh and Miso. In addition, Soy is often genetically engineered and produced in huge monocultures with massive use of pesticides. This contradicts our concept of “clean baking”.