No. Soybean is a healthy legume. They’re high in essential nutrients and minerals, and offer up relatively complete amino acids. Over the years, there has been some talk of how ‘isoflavones’ or ‘phytoestrogens’ in soy can detrimentally affect our hormone levels. But the current consensus within the scientific and nutritional communities, is that conversely – isoflavones found in soy are thousands of times weaker than oestrogen, and can actually help reduce the incidence of certain cancers. Additionally, soy does not lower your testosterone levels.