Actually most of the soybeans in the U.S. have been genetically modified so you have reason for concern. However, Progest-E, though sometimes sourced from soybeans, is not from a genetically modified source.
This type of quality progesterone alternates from being created from soybeans and wild yams. We have had no negative feedback from customers concerned with its use in that regard.
Remember, wild yams and soybeans cannot provide progesterone so these natural sources are taken into the lab and as gently as possible, are synthesized as progesterone. The resulting product is no longer soybean or wild yam.
While it would be nice to get our progesterone directly from a plant source, it’s not possible to my knowledge.