Yes! RbyNLash ® does not contain Soy (soy can also be known as lecithin/soy lecithin); which has been known to be an endocrine/hormone disruptor and many patients are advised by their doctors not to use any products with endocrine disruptors, such as soy, in them. However, when undergoing any treatment, it is always best to consult with your doctor if you are unsure about any new product.